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Questions tagged [lighting]

Planning, installing and using either indoor or outdoor artificial lights.

31
votes
3answers
312k views

Why do my LED lights stay on, even when the switch is off?

I have two LED lamps in my corridor, and when I switch them off, they keep emitting light (not very strong, but it's annoying at night). What can it be? How can I fix it?
34
votes
3answers
249k views

How should I rewire a miswired 3-way switch?

I have a 3 way switch that was wired incorrectly when the switches were replaced with a different color switch. Is there a methodical way for me to identify which wires represent which piece of the ...
6
votes
5answers
78k views

Why am I getting 50V at a light when the switch is off?

I am trying to put in a switch and a light it controls in a storage building and this is how I wired it. Click for larger view When I checked the wiring it registered 120V when the switch was on, ...
0
votes
2answers
19k views

Unexpected voltage with switch turned off

I am doing some work on a ceiling light and I notice that, even though the light-switch is off, my voltage tester shows voltage present. Answers to other questions (below) explain about phantom ...
6
votes
3answers
7k views

Why does using a dimmer with this ceiling fan and lights cause energy saving bulbs to flicker?

At a hotel I manage we purchased 34 ceiling fans with two integrated light sockets that operate on a dimmer all controlled by a remote control. Obviously using a dimmer with fluorescent bulbs won't ...
5
votes
4answers
46k views

Can I safely ground a light fixture if the ceiling box has two hot and one neutral wire (no ground wire)

Checking for dupes, I saw this question, but the situation appears different as my box is metal, among other things. I'm fairly new to electrical projects, so bear with me. I recently installed a new ...
10
votes
3answers
118k views

Is it okay to have an ungrounded light fixture?

I recently moved into an older home (built in 1968) and have been replacing some of the older light fixtures. We pulled down one of the lights and found that there is a ground running into the box but ...
7
votes
5answers
26k views

Can I use a 23 W CFL in a fixture that's rated for a 60 W incandescent?

I have a lamp that is rated at 60 Watts for an incandescent bulb with a disclaimer to use a 13 Watt bulb instead when using a CFL replacement. Do I really need to respect that disclaimer? Would not a ...
19
votes
1answer
86k views

What do I need to install LED strip lighting?

I've been looking to install LED strips, either RGB or white for lighting and ambiance. It wouldn't be the main lighting of the room, so no necessity for high power LEDs. The perimeter of the room is ...
6
votes
4answers
136k views

How can I install a light fixture in the ceiling of a finished room?

In my dining room, I would like to install a ceiling light in the center of the room. This room is on the ground floor of a colonial two-story, so there is no attic access into the ceiling; my work ...
9
votes
1answer
142k views

Is it normal to have a light switch setup using only the hot wire?

I was changing the light switches around the house when I came upon this setup. The two switches to the right are all wired using the hot wire (black) from the two electrical wires on the back panel. ...
7
votes
9answers
30k views

How do I put a fluorescent light on a motion sensor?

I have a couple closets in my basement that I have outfitted with a fluorescent light attached to a motion sensor (this one). The idea was that when you open the closet door, the light comes on ...
8
votes
3answers
281k views

How should I connect the ground wire for my light fixture?

I am replacing a light fixture in my bathroom and have the following setup: The electrical box is plastic The wire coming from supply has black (hot), white (neutral) and copper (ground). The light ...
6
votes
1answer
1k views

What do I need to replace 4 light switches on the same circuit?

So we have a single light in our living room that can be turned on/off from four different switches at various entrances to the living room. We're currently replacing all the switches in our house as ...
2
votes
4answers
83k views

Ceilling light wont switch off after a new installation

I have bought a new ceiling light to replace an old-fashioned one. I have 3 grey cables hanging from the ceiling: 3 red wires connected together and 3 green wires connected together and 3 black but ...
9
votes
1answer
21k views

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

I am having trouble retrieving the light bulb in this fixture: I tried bending the claws to release the dome, but that did not work. I tried twisting the whole fixture many times in either direction, ...
5
votes
3answers
855 views

Can you help me find this bulb?

I need to replace the light bulb in my ceiling fan but the part\model number is warn off and I can't find it anywhere! I can read "Philips," "Plus," and "G5" but nothing else. Please see the attached ...
18
votes
4answers
188k views

How do I remove a flush mounted ceiling light fixture dome?

My bedroom has a very nice looking flush mounted ceiling light with a glass dome. However, all the bulbs have gone out and I cannot get the glass out to replace them. I'm 5'4" and standing on the ...
12
votes
3answers
2k views

Can someone explain how this makes sense electrically?

The wiring in my house is... odd. Nearly every pair of outlets has one of the outlets connected to a light switch. Sometimes that switch is quite far from the outlet even when there are other closer ...
4
votes
3answers
7k views

How can/should I mount this porch light?

I want to mount a porch light on my outdoor shed/office. I recently had an electrician place interior wiring however I elected to do the fixtures myself. Uh oh. Here's what the back of the porch ...
6
votes
6answers
30k views

How do I wire a two tube ballast to a single tube fixture?

I am replacing a ballast for a single tube. The new ballast I purchased is designed for two tubes but states that it is also compatible with a single (more powerful) tube corresponding exactly to what ...
4
votes
4answers
22k views

Can I use a motion sensor to control fluorescent lights that are plugged into an outlet?

In my garage, the light switch by the door is wired to an outlet on the ceiling. I've got two, inexpensive 4' fluorescent lighting fixtures plugged into that outlet. I know that wiring a fluorescent ...
2
votes
2answers
2k views

What type of wiring should bedroom overhead lighting have?

On the phone with a friend in Cali this morning. He said that some municipalities are requiring /4 (12-3 or 14-3 romex) wiring for all new construction or rewiring for overhead lighting components. ...
2
votes
1answer
13k views

Is there some kind of adapter for an old ceiling box?

I was replacing a light in the entry vestibule at our new house with a cheap flush mounted light fixture. When I removed the old light I discovered that the ceiling box is an old type with a cross bar ...
1
vote
1answer
121 views

Replacing receptacle with GFCI outlet which will be tapped for outdoor pole lantern

I am installing an electric outdoor pole lantern which will be fed by an underground UF cable in conduit buried 24" I would like to tap into a new GFCI outlet which will will be replacing a regular ...
1
vote
3answers
4k views

Add combo (switch and outlet) with only two wires out of wall for the current light)

I probably have this diagram for my project. Or problem. Facts: a) only 2 wires out of wall, B & W; b) switch ON, lights ON Ceiling electrical box: One black and one white connects to the ...
1
vote
2answers
3k views

What is the maximum wattage LED bulb that can be used in a 75 watt fixture?

What is the absolute maximum wattage LED bulb that can be used in a fixture rated for 75 watt incandescent bulbs?
0
votes
3answers
3k views

Why aren't my PIR security lights working through my window?

Can any one help? I purchased a solar powered PIR security light, with the intention of putting it inside my kitchen window. The PIR would be inside the window, but this does not work. When I go ...
0
votes
1answer
2k views

Wiring up a ceiling light with earth cable

I'm changing a light fixture in my kitchen. It's something I've done plenty of times but this one keeps on tripping my circuit breaker fuse, cutting power to all my downstairs lights. The only ...
0
votes
1answer
222 views

Why am I seeing only 30v across a light?

I'm in the US. While repairing a light fitting I noticed that with the breaker on I was seeing only 30V AC, instead of the expected 120-ish. However, the now-repaired light fitting is working as ...
54
votes
10answers
62k views

When I turn down the dimmer switch on my lights, do I actually use less electricity?

My wife and I have several lights on dimmer switches throughout our home. We generally prefer the ambient lighting provided by dimmed lights. I am curious, though, if we are saving any electricity by ...
21
votes
8answers
15k views

Are standard light bulb bases being phased out?

Recently we've been shopping for light fixtures, and have noticed a dramatic increase in non-standard bulbs. CFLs in particular seem to be drifting away from the common threaded base, in favor of 2-...
24
votes
10answers
74k views

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

I recently bought some nice inexepensive LED bulbs but I noticed the warning states: (see image below) not for use in totally enclosed luminaires I am guessing that it gets too hot but I find it ...
4
votes
5answers
17k views

What do I need to know about LED strip lighting?

I've read a ton of various posts about different aspects of LED lamps, strips, comparisons with fluorescent and incandescent lamps, and I decided that I want to install LED strips to light my room. ...
13
votes
2answers
3k views

Is there a good rule of thumb for how many lights you need in a room?

I want to use ceiling recessed wall washers in a 13 ft by 24 ft room. Any advice on light spacing so I don't create dark spots? How far from the wall vs how far apart from each other should they be?
11
votes
1answer
8k views

How to replace a standard 2-gang light switch with an electric dimmer switch

I'm looking for a some assistance in fitting a new electric dimmer light switch. I'm in the UK if that makes a difference. I am trying to replace my existing two-gang light switch with a LightWaveRF ...
7
votes
5answers
54k views

Why do light bulbs all over the house burn out disconcertingly fast?

I've found a couple answers to this question. This generally revolve around the scenario where it's bulbs in a general area such as a fan. My issue is that light bulbs all over the house burn out ...
2
votes
3answers
25k views

No Ground Wires - Can I connect a wire to the metal box for ground?

I want to install new z-wave light switches that require a ground, but it appears that none of the electrical boxes in my house have ground wires and the previous light switches didn't use a ground. ...
19
votes
3answers
186k views

Do I really need a special bulb in the oven?

My oven light burnt out recently. After dismantling it I found a 40W 130V "appliance" bulb with a standard Edison connector. The bulb is slightly smaller than a normal incandescent bulb. Looking for ...
14
votes
3answers
3k views

Can I safely use a switch rated for “1A at 125V” with 240V, assuming I stay below 125W?

I recently purchased a foot switch for a standing lamp. The switch is rated for 1A at 125V. I would like to use this switch with a low energy lamp (typically 10W or below) but with a 240V supply. Is ...
11
votes
7answers
74k views

What exactly is a PAR type LED lamp, how does it differ from R/BR type LED & CFL lamps?

I am in the process of replacing my incandescent bulbs with more efficient alternatives. My home is about 14 years old, I've owned it for a little over three years. It seems most of the bulbs that it "...
11
votes
6answers
37k views

Are CFL bulbs safe for enclosed fixtures?

I just got 3 dozen CFL bulbs for free, and was planning on replacing all the non-downward exposed fixture lights in my home with these bulbs. In the past I haven't even considered switching to CFL ...
9
votes
3answers
5k views

How can I stop bulbs from buzzing when dimmed?

I've got some hanging lights with "Fat Albert" bulbs that are plugged into a dimmer switch. When they're dimmed to certain levels, the bulbs make a soft buzzing sound. The buzz is amplified and ...
9
votes
1answer
13k views

What is the difference between dimmable and non-dimmable CFL bulbs?

I have a dimmable ceiling light fixture in the Dining room. I put in CFL bulbs a few months ago. It all seems to work fine, no problem. I went to a hardware store yesterday and saw that there were CFL ...
8
votes
6answers
55k views

How do I stop a dimmer switch from humming?

I installed a dimmer switch in my washroom and it's making a buzzing noise. The more I increase resistance/rotate the dimmer clockwise, the louder it gets. The humming seems to be coming from the ...
8
votes
4answers
25k views

How to hang modern fixture over old square recessed box?

I purchased a home built in 1958 and a few rooms have these square recessed light boxes. I would like to hang a larger diameter modern flush-mount fixture over them, but I'm not sure what the way to ...
7
votes
3answers
26k views

Why does my fluorescent light fixture take minutes to turn on in high heat and humidity?

Our kitchen fixture won't come on for 3 to 5 minutes when the temperature goes over 90°F (32.2°C) and 90% humidity. It flickers and only reaches 80% brightness after that. It will occasionally ...
6
votes
2answers
1k views

Does lamp maximum wattage matter for CF bulbs? [duplicate]

Say I have a table lamp that states (via a slightly scary sticker) that it takes a 60W max bulb. Of course, that was based around incandescent wattages. Is there any risk with putting in a CF bulb ...
5
votes
1answer
2k views

What is the best way to light a Lexan (Polycarbonate) sheet?

I've recently installed a Lexan 'whiteboard' in my garage which works as well as I'd hoped. I now want to use some type of lighting to light up the board in a useful/visual appealing way. Shown ...
5
votes
2answers
7k views

Can a low voltage light switch be located in a closet as opposed to outside the closet?

Okay you guys I have next question. And like all good questions this one begins with a story. I was reading the post about a nick in a wire and read a couple of you mention that light switch in a ...