68 votes

How do I keep the lights on permanently?

In increasing order of difficulty: Write "Leave On" on tape on the switches. What, really, are you worried about? This gives you 99.9% of the result for 0.1% of the effort. Install ...
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  • 18.7k
56 votes

LED Light bulbs burning out much sooner than expected

Yup, that's marketing. And then, these bulbs don't last long, either. They work fine for about 3 months, but then they start randomly getting dim for a minute or two, then getting bright again for a ...
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42 votes

Do I NEED to use correct colors when wiring always?

Electricity doesn't care about color. But electricians (both pros and amateurs) do. The color is meant to inform both you and any future worker which wires are hot (usually black or red, but ...
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  • 33.2k
41 votes
Accepted

Are there LED lamps available for ovens?

As already stated, LEDs can't take the heat. In addition: Many ovens use halogen bulbs instead of "ordinary" incandescent bulbs. These are a type of incandescent light with two key ...
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40 votes

Can I safely use a 9w LED bulb in place of a 40w incandescent?

Yes. The fixture is concerned with heat. Your LED light bulb makes about 9 watts of heat. Your fixture is rated for a bulb that makes 40 watts of heat. With an incandescent bulb, 98-99% of its ...
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40 votes
Accepted

What type of bulb is this?

It's a "G9" base Halogen bulb.
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  • 1,539
38 votes

Turn one light bulb ON and another OFF at the same time with one switch

A single-pole, double-throw switch would do the job. A common 3-way switch is exactly that. You'd simply connect power to the common screw, and run power out from each of the traveler screws. All ...
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  • 107k
37 votes

How do I change a light bulb I can't grip?

Take a piece of duct tape and wrap it in the shape of an "O", with the sticky side of the tape on the outside. Stick the loop of tape to the face of the light bulb such that it is secure. Put your ...
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  • 515
35 votes
Accepted

Why do my led bulbs state: not for use in totally enclosed luminaires?

Yes, it is because of the heat buildup in enclosed fixtures, and no you should not use the bulb in that ceiling fixture you listed unless you are willing to accept shortened bulb life. Your options ...
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  • 13.7k
34 votes

Are mini wall switches available that are less conspicuous?

Low voltage is the key. LEDs are naturally low voltage devices. That is different from traditional incandescent. While incandescent bulbs can be low voltage (e.g., in cars), they require a lot of ...
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32 votes
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What could be causing changes to a smart bulb to affect a regular bulb on the same circuit?

You're looking at the problem upside down. You are thinking the smart bulbs are causing it. Actually, the Lutron Caseta dimmer is causing it. The smart bulbs are behaving normally, however their ...
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30 votes
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Is an extra 1 W that significant with LED bulbs?

There are two completely different thermal objectives First, don't set other stuff on fire. That's decided by the thermal insulation of the fixture (think: thick insulation in down lights) and limits ...
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29 votes
Accepted

Why won't a LED bulb work in a standard light fixture?

I found the answer! @diceless set me on the right track in looking at where the foot of the bulb is connecting to the fixture. Since it was an older fixture (installed in the 80's, I think), the hot ...
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  • 589
29 votes

Is it safe to put a 120W equivalent LED bulb in a 100W max fixture?

Yes, that is fine "like" /"equivalent", etc. are based on light output. Limitations on fixtures is based on heat output. Some power (Watts) becomes light, the rest becomes heat. ...
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29 votes
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What is the device attached to my recessed light junction box?

It is a thermal protector for a recessed ceiling light. It will cut out the light if the temperature of the outside of the fixture exceeds the rating of the protector. All UL approved fixtures will ...
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  • 57.3k
27 votes

Turn one light bulb ON and another OFF at the same time with one switch

Use a single pole double throw switch, called three-way in the U.S. (as isherwood suggests). Wire it like this and the circuit will do what you say you want. Of course with this, there is no way to ...
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27 votes

Light won't switch off after blowing fuse

What happened is that when you turned the switch on, the shorted adaptor drew an enormous surge of current through the switch. The fuse almost immediately blew and prevented a fire, but not before the ...
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26 votes
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Should there be insulation inside a light fixture?

This is a good question - seeing some insulation in your light fixture can be a bit of a shock. Think about it, though. Those incandescent bulbs are inside a glass globe. One of the best features of ...
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  • 31k
25 votes
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Do new wire runs in an existing ceiling need to be stapled down?

If you are not removing more drywall than needed for the new recessed lights, then no per 334.30(B)(1) (assuming you are using NM cable). There are similar clauses for other flexible cable assemblies (...
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24 votes
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What could cause halogen bulbs to explode?

"One exploded after an hour" as indicated by @fixer1234 this is caused by finger oils or other contaminates on the lamp envelope itself (not the reflector). Its very important not to touch anything ...
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  • 4,140
23 votes

About how much does it cost to leave 12 led bulbs 60watt replacement burning for 24 hours?

a "60W replacement" LED is usually around 10W actual. 10W * 12bulbs * 24 hours = 2880Watt-hours 2880Watt-hours = 2.88 kilowatt-hours Your electric bill shows the price / kilowatt-hour. For me, ...
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  • 331
22 votes

Can I safely use a 9w LED bulb in place of a 40w incandescent?

SHORT ANSWER: NO PROBLEM LONG ANSWER: The maximum wattage limits are largely a function of heat. For incandescent lights, more wattage means more heat. And too much of a heat buildup could result in ...
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  • 33.2k
21 votes
Accepted

Why is a neutral wire needed for most 'smart' light switches?

Put simply; the smart switch contains electronics that needs power to operate, while a regular switch just mechanically cuts the load. Regular switch: Smart switch: Source: http://www.vesternet.com/...
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21 votes

Why do my led bulbs state: not for use in totally enclosed luminaires?

Even if LED or even CFL bulbs create far less waste heat than a conventional lightbulb, they react far more adversely to the heating resulting from ANY waste heat. A lightbulb won't care if it is in ...
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21 votes

Lights are flickering on and off after accidentally bumping into light switch

Removing the cover to look at the switch is safe IF you first turn off power to the circuit at the breaker panel. If you aren't completely sure which circuit it is, then either turn them all off, or ...
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  • 6,269
20 votes
Accepted

How can I change the bulb in this three-clawed, ceiling-mounted dome light fixture?

Usually at least one of the "claws" is spring-loaded, and can be pulled straight out to release the glass.
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  • 16k
20 votes
Accepted

20 amp circuit breaker failed to trip

Infinite time. Your 12 amp vacuum cleaner is probably labeled according to the maximum current it can draw (to be sure, look at its electrical specifications rather than the big marketing label some ...
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19 votes

How do I change a light bulb I can't grip?

Get a light bulb changer pole at your local home improvement store or your favorite hardware store. The ones with suction cups are best for flood lights, where the face of the bulb is a little flatter,...
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  • 5,696
19 votes

How much power do LED smart bulb wireless control systems consume when the light is turned off?

The specs are out there, just not always so easy to find. For example, one Philips Hue is rated at 9.5W with max. standby of 0.2W. (Click "The bulb" on the right side under Technical Specifications). ...
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