Snappower: Lighted Switch Covers & Outlet Lights

SnapPower GuideLights

 

How it works

No wires. No batteries.

Installs in seconds.

Simple installation

Step 1: Turn power off to outlet and remove cover plate

Step 2: Insert SnapPower GuideLight over outlet

Step 3: Secure screw and enjoy!

Product Features

Designed with

you in mind

Free up your outlets

Get rid of your bulky plug-in night-lights! We’ve designed an innovative solution for home lighting that leaves both outlets free.

Unlimited lighting potential

We help you get that premium lighting you’ve always wanted without breaking the bank. Designed to look like your standard outlet cover and blends in with any home decor.

Lighting in any room.

Bedrooms. Bathrooms. Kitchens. Hallways.

Whether it be pathway lighting to help you get around at night, or that premium look all around the house that you’ve always wanted, our GuideLight products work in any room in your home.

5 Star Reviews

‘These are pretty great!…Slick, clean design,easy install, great service!…The light quality is also great!’

-Fateh K.

‘We bought this because my kids wouldn’tleave the hall night light alone!Was very easy to install.’

-A.S. Price

‘What an absolutely AMAZING product!I am floored that something so simple as this actually works as well as it does!’

-Ronald E.

‘The PERFECT Pathway Lightand So Easy to Install!’

-Barbara G.

‘The PERFECT Pathway Lightand So Easy to Install!’

-Barbara G.

GuideLight 2 PLUS now

for Horizontal outlets!

Islands, Countertops, Shelves, Stairs & more.

Boasting the same simple installation and upgraded features of our GuideLight 2 PLUS. Specially designed for horizontal outlets, commonly seen in kitchen islands and backsplashes, bathroom countertops, garages, shelves, stairways, and more.

 

No wires. No batteries.

Installs in seconds.

Simple installation

Step 1: Turn power off to outlet and remove cover plate

Step 2: Insert SnapPower GuideLight over outlet

Step 3: Secure screw and enjoy!

No wires. No batteries.

Installs in seconds.

Simple installation

Step 1: Turn power off to outlet and remove cover plate

Step 2: Insert SnapPower GuideLight over outlet

Step 3: Secure screw and enjoy!

5 Star Reviews

‘These are pretty great!. ..Slick, clean design,easy install, great service!…The light quality is also great!’

-Fateh K.

‘We bought this because my kids wouldn’tleave the hall night light alone!Was very easy to install.’

-A.S. Price

‘These are SO rad!!!I started with 4 and came back for 6 more.So elegant and just enough lighting.GENIUS idea!!’

-Ronald E.

‘These are SO rad!!!I started with 4 and came back for 6 more.So elegant and just enough lighting.GENIUS idea!!’

-Bonnie M.

‘The PERFECT Pathway Lightand So Easy to Install!’

-Barbara G.

5 Star Reviews

These are pretty great!…Slick, clean design,

easy install, great service!…

The light quality is also great!

Fateh K.

We bought this because my kids wouldn’t

leave the hall night light alone!

Was very easy to install.

A.S. Price

What an absolutely AMAZING product!

I am floored that something so simple as this actually works as well as it does!

Ronald E.

These are SO cool!!! 

I started with 4 and came back for 6 more.

So elegant and just enough lighting.

GENIUS idea!!

Bonnie M.

The PERFECT Pathway Light

and So Easy to Install!

Barbara G.

Designed with

you in mind

Free up your outlets

Get rid of your bulky plug-in night-lights! We’ve designed an innovative solution for home lighting that leaves both outlets free.

Unlimited lighting potential

We help you get that premium lighting you’ve always wanted without breaking the bank. Designed to look like your standard outlet cover and blends in with any home decor.

Lighting in any room.

Bedrooms. Bathrooms. Kitchens. Hallways.

Whether it be pathway lighting to help you get around at night, or that premium look all around the house that you’ve always wanted, our GuideLight products work in any room in your home.

GuideLight 2 PLUS now

for Horizontal outlets!

Islands, Countertops, Shelves, Stairs & more.

Boasting the same simple installation and upgraded features of our GuideLight 2 PLUS. Specially designed for horizontal outlets, commonly seen in kitchen islands and backsplashes, bathroom countertops, garages, shelves, stairways, and more.

GuideLight 2 PLUS now

for Horizontal outlets!

Islands, Countertops, Shelves, Stairs & more.

Boasting the same simple installation and upgraded features of our GuideLight 2 PLUS. Specially designed for horizontal outlets, commonly seen in kitchen islands and backsplashes, bathroom countertops, garages, shelves, stairways, and more.

Designed with

you in mind

Free up your outlets

Get rid of your bulky plug-in night-lights! We’ve designed an innovative solution for home lighting that leaves both outlets free.

Unlimited lighting potential

We help you get that premium lighting you’ve always wanted without breaking the bank. Designed to look like your standard outlet cover and blends in with any home decor.

Lighting in any room.

Bedrooms. Bathrooms. Kitchens. Hallways.

Whether it be pathway lighting to help you get around at night, or that premium look all around the house that you’ve always wanted, our GuideLight products work in any room in your home.

GuideLight 2 PLUS now

for Horizontal outlets!

Islands, Countertops, Shelves, Stairs & more.

Boasting the same simple installation and upgraded features of our GuideLight 2 PLUS. Specially designed for horizontal outlets, commonly seen in kitchen islands and backsplashes, bathroom countertops, garages, shelves, stairways, and more.

Choose your GuideLight

Styles: Duplex / Decor

Installs in seconds,

no wires, no batteries

LEDs last up to 25+ years

Automatic On/Off sensor

Styles: Duplex / Decor / GFCI

Includes all features of GuideLight 2

Bright and Dim Settings

Manual Off Switch

Also available for GFCI Outlets

Styles: Duplex / Decor / GFCI

Includes all features of GuideLight 2 PLUS

now for Horizontal outlets

Also available for GFCI Outlets

Choose your GuideLight

Styles: Duplex / Decor

Installs in seconds,

no wires, no batteries

LEDs last up to 25+ years

Automatic On/Off sensor

Styles: Duplex / Decor / GFCI

Includes all features of GuideLight 2

Bright and Dim Settings

Manual Off Switch

Also available for GFCI Outlets

Styles: Duplex / Decor / GFCI

Includes all features of GuideLight 2 PLUS now for Horizontal outlets

Also available for GFCI Outlets

Hallway Night Light Outlets and Switches

 30 day returns / 1 year warranty / Installs easily in seconds

 30 day returns / 1 year warranty

Outlets

Switches

Safety

Charging

Lighting For Outlets

GuideLight 2 Plus

GuideLight 2

GuideLight 2 Plus Horizontal

MotionLight

Lighting For Switches

SwitchLight for3-Way Switches

SwitchLight

SwitchLight for

Double Gang Switches

SwitchLight for

Triple Gang Switches

Child Safety for Outlets

SafeLight

SafePlate

LED lighting not included

USB Charging for Outlets

Original USB Charger

Clearance item

Outlets

Switches

Safety

Charging

Night Lights for Outlets

GuideLight 2

GuideLight 2 Plus

Includes On, Dim, and OFF Switch

MotionLight

Motion activated pathway lighting

Night Lights for Switches

SwitchLight

SwitchLight for

3-Way Switches

SwitchLight for

Double Gang Switches

SwitchLight for

Triple Gang Switches

The innovative and convenient solution to lighting up hallways and other dark areas around your home

Enhance the look and feel of your home with SnapPower SwitchLights, the hassle-free way to light up dark rooms and replace old light switches.

Child Safety for Outlets

SafeLight

SafePlate

LED lighting not included

SnapPower SafeLights provide a comforting night light and protect curious little fingers from exposed outlets.

USB Charging for Outlets 

Original USB Charger

CLEARANCE ITEM

The easy way to add USB charging to any room

Effortlessly charge devices with SnapPower USB Charger outlet covers – a smart and stylish solution to cord clutter.

Outlets

Switches

Safety

Charging

Lighting For Outlets

GuideLight 2

GuideLight 2 Plus

Includes On, Dim, and OFF Switch

GuideLight 2 Plus Horizontal

MotionLight

Motion activated pathway lighting

Lighting For Switches

SwitchLight

SwitchLight for

3-Way Switches

SwitchLight for

Double Gang Switches

SwitchLight for

Triple Gang Switches

Child Safety for Outlets

SafeLight

SafePlate

LED lighting not included

USB Charging for Outlets

Original USB Charger

CLEARANCE ITEM

Outlets

Switches

Safety

Charging

Lighting For Outlets

GuideLight 2

GuideLight 2 Plus

Includes On, Dim, and OFF Switch

GuideLight 2 Plus Horizontal

MotionLight

Motion activated pathway lighting

Lighting For Switches

SwitchLight

SwitchLight for

3-Way Switches

SwitchLight for

Double Gang Switches

SwitchLight for

Triple Gang Switches

The innovative and convenient solution to lighting up dark areas of your home

Enhance the look and feel of your home with SnapPower SwitchLights, the hassle-free way to light up dark rooms and replace old light switches.

Child Safety for Outlets

SafeLight

SafePlate

LED lighting not included

SnapPower SafeLights provide a comforting night light and protect curious little fingers from exposed outlets.

USB Charging for Outlets

Original USB Charger

CLEARANCE ITEM

The easy way to add USB charging

to any room

Effortlessly charge devices with SnapPower USB Charger outlet covers – a smart and stylish solution to cord clutter.

The power of instant decisions | Rusbase

Malcolm Gladwell. “Illumination. The power of instant decisions. – “Alpina Business Books”, “Williams”, 2007

“If you hurry, you will make people laugh,” says folk wisdom. “Before you do anything, think,” her parental authority maintains. However, life makes its own adjustments, and very often, especially during stressful situations or time pressure, we make decisions based only on intuition.

At such moments, “our momentary judgments and first impressions can offer us much better ways to adapt to this world. The part of our brain that makes instant decisions is called the adaptive unconscious, and the study of this process is one of the most important new areas of psychology, ”writes Malcolm Gladwell in the preface to his book.

Malcolm Gladwell is a journalist, not a psychologist, but his work is based on research in various fields of science, business, art and politics. In the book “Illumination. The Power of Instant Decisions” he formulates and seeks to solve three main problems:

  • Instantaneous decisions can turn out to be just as right as decisions made carefully, after careful consideration.
  • We need to try to understand when our intuition can fail us, and when we should trust our instincts, and when we should be careful about them.
  • The ability to draw immediate conclusions and evaluate first impressions can be developed and, moreover, managed.

Talking about experiments carried out by reputable scientists, the author concludes that “quick knowledge” can be trusted – it allows you to make correct judgments. For example, a twenty-minute stay in a stranger’s apartment can say more about him than many hours of conversation. “Forget about the endless “bringing together” meetings and dinners. If you want to know if I will be a good employee, drop by my house and take a good look around, ”the author advises with humor.

“Any successful top manager, like Jack Welch, could have titled his memoir ‘My Gut’,” writes Malcolm Gladwell. He cites an excerpt from the story of the son of billionaire investor George Soros: “My father told us at length about economic theories, trying to explain why he does what he does … But I remember as a boy I did not doubt that at least half of it is nonsense. That is, we knew that decisions to change positions in the market and so on were made after his back started to hurt. He had real spasms, and that was the signal. ” According to the author, the ability to trust your unconscious played an important role in the success of George Soros. “If we want to improve the quality of our decisions, we need to learn to calmly accept the arcane nature of our instantaneous inferences. We just have to accept the fact that sometimes knowledge comes from nowhere, and agree that sometimes it’s even good, ”says the author.

But “quick cognition” has limitations, because our perception of reality is full of unconscious prejudices that may not coincide with the declared values. For example, “there is ample evidence that being tall (especially in men) triggers a certain set of positive unconscious associations,” the author writes. – The vast majority of CEOs of Fortune -500 are tall white men. Directors as a social group are almost 5 cm taller than all other men in the United States. According to the author, there is an established stereotype of what a real leader should look like, “and this stereotype is so strong that if the candidate matches it, we can neglect other arguments.

Malcolm Gladwell believes that quick, intuitive decisions need to be taken seriously, and recognizing “their enormous influence, both good and bad, and the role they play in our lives, requires us to take active steps to manage first impressions and control them.”

How to recognize and take into account the unconscious bias that prevents you from making the right intuitive decisions quickly, is devoted to chapter “Mistake with Warren Haring: is it worth losing your head at the sight of tall and beautiful brunettes “, which we bring to your attention.

AC power. Current power through coil, resistor, capacitor

Table of contents:

  • Topics of the USE codifier : alternating current, forced electromagnetic oscillations.

  • org/ListItem”>

    Current power through the resistor

  • Current power through the capacitor

  • Current power through the coil

  • Current power in an arbitrary section

The author of the article is Igor Vyacheslavovich Yakovlev, a professional tutor, author of textbooks for preparing for the Unified State Examination

Topics of the USE codifier : alternating current, forced electromagnetic oscillations.

Alternating current carries energy. Therefore, the question of power in the AC circuit is extremely important.

Let and be the instantaneous value of voltage and current in a given section of the circuit. Let’s take a small time interval – so small that the voltage and current do not have time to change in any way during this time; in other words, the quantities and can be considered constant during the interval .

Let a charge pass through our section in time (according to the rule for choosing the sign for the current strength, the charge is considered positive if it is transferred in a positive direction, and negative otherwise). In this case, the electric field of moving charges did the work

The current power is the ratio of the work of the electric field to the time for which this work is done:

(1)

We received exactly the same formula at one time for direct current. But in this case, the power depends on time, oscillating together with current and voltage; therefore the value (1) is also called instant power .

Due to the presence of a phase shift, the current and voltage in the section do not have to match in sign (for example, it may happen that the voltage is positive and the current is negative, or vice versa). Accordingly, the power can be both positive and negative. Let’s take a closer look at both of these cases.

1. Power positive : . Voltage and current have the same signs. This means that the direction of the current coincides with the direction of the electric field of the charges that form the current. In that case the energy of the section increases: it enters this section from the external circuit (for example, the capacitor is charging).

2. Power negative : . Voltage and current have different signs. Therefore, the current flows against the field of moving charges that form this same current.

How can this happen? It’s very simple: the electric field that arises in the area, as it were, “outweighs” the field of moving charges and “pushes” the current against this field. In that case the energy of the section decreases: the section gives off energy to the external circuit (for example, the capacitor is discharged).

If you don’t quite understand what was just discussed, don’t worry – there will be concrete examples further on, on which you will see everything.

back to contents ▴

Current power through the resistor

Let alternating current flow through the resistor with resistance . The voltage across the resistor, as we know, oscillates in phase with the current:

Therefore, for the instantaneous power we get:

(2)

1. We see that the power is non-negative all the time – the resistor takes energy from the circuit, but does not return it back to the circuit.

Fig. 1. AC power through a resistor

The maximum value of our power is related to the current and voltage amplitudes by the usual formulas:

In practice, however, it is not the maximum that is of interest, but average current power. This is understandable. Take, for example, an ordinary light bulb that is lit in your home. A current with a frequency of Hz flows through it, that is, current and voltage fluctuations occur per second. It is clear that over a sufficiently long time, some average power is released on the light bulb, the value of which is somewhere between and . Where exactly?

Look carefully at fig. 1. Do you have an intuitive feeling that the average power corresponds to the “middle” of our sinusoid and therefore takes on the value?

This feeling is absolutely right! The way it is. Of course, it is possible to give a mathematically rigorous definition of the mean value of a function (in the form of some integral) and confirm our guess by direct calculation, but we do not need this. Enough intuitive understanding of a simple and important fact:

the average value of the squared sine (or cosine) for the period is .

Figure 2 illustrates this fact.

2. The average value of the square of the sine is

So, for the average value of the current power on the resistor, we have:

(3)

other than root-mean-square voltage and current . This we have already encountered: the root-mean-square velocity of ideal gas molecules (sheet “Equation of state of an ideal gas”):

(4)

Formulas (3), written in terms of effective values, are completely similar to the corresponding formulas for direct current: then in both cases the light bulb will burn equally brightly.

Effective values ​​(4) are extremely important for practice. It turns out that AC voltmeters and ammeters show exactly the effective values ​​ (so they are arranged). Also know that the notorious volts from the outlet are the current value of the household mains voltage.

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Current power through the capacitor

Let an alternating voltage be applied to the capacitor. As we know, the current through the capacitor leads the voltage in phase by:

For instantaneous power, we get:

3.

Fig. 3. AC power through capacitor

What is the average power value? It corresponds to the “middle” of the sinusoid and in this case is equal to zero! We see it now as a mathematical fact. But it would be interesting from a physical point of view to understand why the power of the current through the capacitor is zero.

To do this, let’s draw graphs of voltage and current in the capacitor during one period of oscillation (Fig. 4).

Fig. 4. The voltage on the capacitor and the current through it

Let’s consider successively all four quarters of the period.

1. First quarter , . The voltage is positive and increasing. The current is positive (flowing in the positive direction), the capacitor charges. As the charge on the capacitor increases, the current decreases.

Instantaneous power positive: the capacitor stores the energy from the external circuit. This energy arises due to the work of an external electric field that promotes charges on the capacitor.

2. Second quarter , . The voltage continues to be positive, but is decreasing. The current reverses and becomes negative: the capacitor discharges against the direction of the external electric field. At the end of the second quarter, the capacitor is completely discharged.

Instantaneous power is negative: the capacitor is dissipating energy. This energy returns to the circuit: it goes to do work against the electric field of the external circuit (the capacitor, as it were, “presses” the charges in the direction opposite to that in which the external field “wants” to move them).

3. Third quarter , . The external electric field changes direction: the voltage is negative and increases in absolute value. The current strength is negative: the capacitor is charging in the negative direction.

The situation is completely similar to the first quarter, only the signs of voltage and current are opposite. Power is positive: the capacitor again stores energy.

4. Fourth quarter , . The voltage is negative and decreases modulo. The capacitor discharges against the external field: the current strength is positive.

Power negative: Capacitor returns energy to the circuit. The situation is similar to the second quarter – again with the replacement of the current and voltage signs by the opposite ones.

We see that the energy taken by the capacitor from the external circuit during the first quarter of the oscillation period is fully returned to the circuit during the second quarter. This process is then repeated again and again. That is why the average power consumed by the capacitor turns out to be zero.

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Current power through the coil

Let alternating voltage be applied to the coil. The current through the coil lags the voltage in phase by:

For the instantaneous power, we get:

Again, the average power turns out to be zero. The reasons for this are, in general, the same as in the case of a capacitor. Consider the graphs of voltage and current through the coil for a period (Fig. 5).

Fig. 5. Voltage on the coil and current through it

We see that during the second and fourth quarters of the period, energy enters the coil from the external circuit. Indeed, voltage and current strength have the same signs, the current strength increases in absolute value; to create a current, an external electric field does work against the vortex electric field, and this work goes to increase the energy of the magnetic field of the coil.

In the first and third quarters of the period, voltage and current have different signs: the coil returns energy to the circuit. The vortex electric field, which supports the decreasing current, moves the charges against the external electric field and thereby does positive work. And what is this work done for? Due to the energy accumulated earlier in the coil.

Thus, the energy stored in the coil in one quarter of the period is completely returned to the circuit during the next quarter. Therefore, the average power consumed by the coil turns out to be zero.

back to contents ▴

Current power in an arbitrary section

Now consider the most general case. Let there be an arbitrary section of the circuit – it may contain resistors, capacitors, coils … Alternating voltage is applied to this section.

As we know from the previous leaflet “Alternating current. 2″, there is some phase shift between the voltage and the current in this section. We wrote it like this:

Then for the instantaneous power we have:

(5)

Now we would like to determine what the average power is. To do this, we transform expression (5) using the formula:

As a result, we get:

(6)

But the average value of the value is zero! Therefore, the average power turns out to be:

(7)

This formula can be written using the effective values ​​(4) of voltage and current:

Formula (7) covers all three situations discussed above. In the case of a resistor, we have , and we arrive at formula (3). For a capacitor and a coil, and the average power is zero.

In addition, formula (7) gives an idea of ​​a very general problem related to the transmission of electricity. It is extremely important that the consumer has as close to unity as possible. Otherwise, the consumer will begin to return a significant part of the energy back to the network (which is completely unprofitable for him), and besides, the returned energy will be irretrievably spent on heating wires and other circuit elements.

Designers of electrical circuits containing electric motors have to deal with this problem. The windings of electric motors have large inductances, and a situation arises that is close to a “clean” coil. To avoid useless circulation of energy through the network, additional phase-shifting elements are included in the circuit – for example, the so-called compensating capacitors.

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