Hot answers tagged

62 votes
Accepted

If a light bulb is dead, does it still consume electricity if the switch is in ON?

It depends on the type of bulb. Regular incandescents won't consume any electricity if the bulb is dead, since there's no continuous path for the current to take. It's just like an open switch. ...
  • 8,523
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 ...
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 ...
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 ...
  • 13.7k
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 ...
  • 33.2k
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 ...
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.
  • 16k
16 votes

How do I change a bulb from my recessed lighting fixture?

Here is what the process of pulling the cover down will look like. The bulb is inside. If you can't get your fingers around it to unscrew it and need to use the suction cup, you can squeeze the spring ...
  • 14.5k
13 votes

Are standard light bulb bases being phased out?

Five years gone, here's the situation in America today: March 2016. Or rather, shops near Berkeley, California, which had a big hand in development of the CFL. Target. Incandescent bulbs (...
13 votes

Are there LED lamps available for ovens?

Not gonna happen. Can't take the heat. Those consumer products one calls an "LED light bulb" is a built consumer product made of components - case, heat sink, electronics and an array of ...
11 votes
Accepted

How do I change a bulb from my recessed lighting fixture?

Try grabbing the trim ring underneath the edges and pulling straight down. They usually have a springy bracket that holds them in place. Once down, the bulb will be exposed.
  • 60.4k
11 votes

Are there LED lamps available for ovens?

I think it's unlikely that this is possible. The environment in the oven in quite mild compared with an incandescent lamp, but LEDs, being semiconductor devices generally don't function well above ...
  • 21k
10 votes

What should I do to increase the dimming range of LED bulbs?

I'm in same boat. When I redid the house I'm in, I installed as much LED lighting as I could and the rest is halogen. What I've learned is, dimming range is based completely on the driver in the LED ...
  • 4,366
9 votes
Accepted

Are standard light bulb bases being phased out?

As of 2017, regulatory changes in the United States have obsoleted most of the answers here (and elsewhere on the Internet). Short answer: Edison screw-type bases aren't going away. The US ...
9 votes

Are there LED lamps available for ovens?

Even if you could, I wouldn't trust that the plastics, solder and semiconductors of an LED lamp wouldn't leach unfriendly chemicals out into the oven's air, and then into the food. There's a reason ...
  • 209
8 votes
Accepted

Why shouldn't different types of bulbs be used in the same fixture?

For a multi-bulb fixture the LED units do not want to be in the area where high heat is generated as would be the case with incandescent or especially with halogen bulbs. CFLs have their own special ...
  • 62k
7 votes

What should I do to increase the dimming range of LED bulbs?

The LED is the most dimming-friendly light source ever made. The problem is that most people are using screw-in "incandescent replacement" LED modules, with obsolete dimming schemes** intended for ...
7 votes
Accepted

What is the standard 120V light bulb screw base in the US?

The US 120 volt screw base is an E26. The 'E' indicates an Edison screw base and 26 is the diameter in millimeters. Source: Wikipedia (footnote 3) In 120-volt North America and 100-volt Japan, the ...
  • 231
7 votes

What type of bulb is globe-shaped with coils inside?

It's a CFL globe, but it's either a very old (early prototype) model that warms up slowly or it's simply worn out. Also, according to DoxyLover... ...the glow is starting at the ends of the ...
  • 109k
7 votes
Accepted

What is a "JC type" light bulb?

JC : J From the word “Jod” – It means “Iodine” in German and indicates that it is a Halogen lamp. C From the word “Cine” Indicates that the primary application for lamp is Cinema but can include ...
  • 4,417
7 votes
Accepted

How to select the most appropriate indoor LED bulb color

This is really an opinion question, so I will just explain the color frequency and a listing to look for so that you have the information to make your decision. First, the different lamps have color ...
  • 100k
7 votes

How do I change a bulb from my recessed lighting fixture?

On many types of fixtures... You just unscrew the bulb! On those fixtures there is a small margin between the bezel and the flat lensed/Fresnel'd surface. That flat surface is the bulb. See, it ...
6 votes

How do I determine what max 3 way bulb will be safe in my lamp?

If it says 60 watts max, then the maximum wattage bulb you can safely use is 60 watts. If you could find a 3-way incandescent bulb like a 20-40-60, that would be safe. But I've never seen one that ...
  • 4,724
6 votes

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

I called the number on the box to ask the company in ref to the "caution notice" about "Not for use in totally enclosed luminaries". They said that it could shorten the life of the bulb. I asked about ...
  • 61
6 votes

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

When a lamp lists a maximum wattage, its doing that based on the heat an incandescent bulb of that wattage will put off. The 9W=75W on the LED bulb is telling you that "even though this bulb only ...
  • 26.8k
6 votes

What kind of bulbs should I get? My bulbs does not look normal

Those are 2 or 4 pin CFL bulbs. Sorta like this: Technically, you should handle them with care, as the contents of the tubes are toxic. Turn off the power to the light, wear sturdy gloves, and pull ...
6 votes

If a light bulb is dead, does it still consume electricity if the switch is in ON?

If it is a true incandescent light bulb: NO, apart from very very minor losses (through insulation imperfections and transmission line effects) due to the fact that a longer run of wiring is now live. ...
6 votes

Why would a light fixture be incompatible with dimmer switches?

The best explanation I can think of is that many compact fluorescent(CFL) and LED bulbs are not compatible with dimmers. The reason why is non-dimmable CFLs cannot and should not ever be used with ...
  • 21k
6 votes
Accepted

Light bulb stays on regardless of switch position after breaker flipped

It sounds like the element in the lamp welded and caused a dead short. With the switch off it worked the first time but the second time the switch welded. It happens. Time to replace the switch
  • 100k
6 votes
Accepted

Help identifying possible dual pot light plug

Thos MR16 GU5.3 light bulbs are 12 volt bulbs. The GU10 bulbs are 120 volt. There is little to zero chance that this is some sort of "Dual Socket". And if it were, it would still likely be ...
  • 1,667

Only top scored, non community-wiki answers of a minimum length are eligible