Questions tagged [lighting]

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

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42 votes
3 answers
494k 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?
opalenzuela's user avatar
5 votes
2 answers
117k 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 ...
RedGrittyBrick's user avatar
41 votes
4 answers
328k 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 ...
Doug Porter's user avatar
10 votes
3 answers
400k 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 ...
SwDevMan81's user avatar
7 votes
5 answers
162k 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, ...
willocks1718's user avatar
8 votes
5 answers
32k 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 ...
Ziplin's user avatar
  • 223
12 votes
3 answers
268k 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 ...
rynmrtn's user avatar
  • 349
10 votes
1 answer
217k 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. ...
Pierre-Alain Vigeant's user avatar
6 votes
3 answers
8k 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 ...
Mike's user avatar
  • 173
6 votes
4 answers
60k 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 ...
Jaydles's user avatar
  • 594
22 votes
1 answer
88k 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 ...
sazpaz's user avatar
  • 335
19 votes
4 answers
237k 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 ...
Katey HW's user avatar
  • 293
8 votes
4 answers
163k 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 ...
BTownTKD's user avatar
  • 183
7 votes
9 answers
34k 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 ...
Eric Petroelje's user avatar
6 votes
1 answer
2k 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 ...
Shpigford's user avatar
  • 696
5 votes
3 answers
1k 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 ...
Josh M.'s user avatar
  • 169
2 votes
4 answers
133k 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 ...
hassan's user avatar
  • 21
22 votes
6 answers
70k views

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

I bought a reading lamp that on the box says: Max 1x40W The shop also sold me an LED light bulb that says: 9W=75W So my question is, can I use light bulb or not? I am confused between the 75W and the ...
Jim's user avatar
  • 481
22 votes
3 answers
25k views

Do new wire runs in an existing ceiling need to be stapled down?

I've heard some people say that code requires wiring in the wall to be stapled to framing every so often (how often?), but when you are doing a remodel, is that necessary? I have a two story house, ...
JPhi1618's user avatar
  • 27.8k
13 votes
5 answers
22k views

Do I NEED to use correct colors when wiring always?

What I am wondering is if there is any code that is violated if the wrong colors are used in wiring outlets? For example, it is standard to use white as neutral and black as power but if I only had ...
Eric F's user avatar
  • 732
12 votes
2 answers
30k views

Should there be insulation inside a light fixture?

I recently moved into a new home, and I was replacing a light bulb when I found this after removing the glass cover. Now, I don't know much about codes and regulations, and I'm new to working on my ...
Graham Harper's user avatar
11 votes
1 answer
9k views

Light won't switch off after blowing fuse

I recently tried to change a bulb using an adaptor (converting from a E27 to B22 fitting). After switching on the light fitting the fuse had blown. After inspection it turns out the adapter is faulty ...
Andy's user avatar
  • 111
11 votes
3 answers
3k 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 ...
Joel Croteau's user avatar
11 votes
1 answer
35k 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, ...
Gareth's user avatar
  • 113
7 votes
3 answers
77k 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. ...
Erik's user avatar
  • 73
6 votes
6 answers
49k 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 ...
Marc-André Lafortune's user avatar
6 votes
7 answers
24k views

Can multiple 2-way occupancy motion sensor switches be used together?

Can multiple 2-way occupancy (AKA motion) sensor switches be used together? For the top and bottom of a staircase, I want the lights to be on if either switch senses motion and the lights stay on ...
Todd's user avatar
  • 163
5 votes
8 answers
21k views

Will switching to LED lightbulbs make a significant difference in my electric bill?

I asked Reliance Controls about a THP103 meter that I was having trouble with. Turns out that it's not a true RMS meter and thus is unable to give you accurate readings on a CFL or LED installation. ...
Lionel Morrison's user avatar
5 votes
4 answers
18k 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 ...
Mike B's user avatar
  • 8,083
4 votes
4 answers
28k 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 ...
Alan W. Smith's user avatar
3 votes
1 answer
235 views

How can I evaluate solar panels to power night lights in areas that don't get direct light?

I have a creek crossing in the woods: This photo is in the early spring. During the summer it's a bit like a jungle. We've considered the idea of putting foot lights along the edges of the crossing. ...
Tango's user avatar
  • 528
3 votes
2 answers
38k views

Neutral Wire is used to carry power to light switch - is this legal?

Forgive me for my crappy drawing :) to make a long story short I just moved into a home and I am taking a look at one of the lighting jobs. I noticed the light switch had no power feeding it and the "...
Andrew's user avatar
  • 426
3 votes
6 answers
1k views

How can I 'share' lights between multiple circuits?

I am installing a rectangle of 3 x 4 recessed can lights in the ceiling and would like to have 4 separate circuits where each individual row of lights can be illuminated by its own switch. This means ...
StreakyBonehead's user avatar
3 votes
1 answer
24k 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 ...
Matt Burland's user avatar
3 votes
3 answers
29k views

What does it mean when an LED bulb starts blinking randomly?

Recently I noticed that my led bulb turns on/off for a split second randomly over the past few days. Does this mean it is starting to die or could it be something wrong with the lamp? I've unscrewed ...
MrOwl's user avatar
  • 31
3 votes
1 answer
2k views

Can I use individual wires from romex bundle?

I am wiring three overhead florescent lights in my unfinished basement and I need 14/3 because of where the switch is located. The wiring already present between the fixtures is 14/2. I have a length ...
Evil Elf's user avatar
  • 3,809
2 votes
2 answers
343 views

Can someone explain this wiring configuration to me?

See my previous question for more detail on my household's bizarre wiring. Three of my bedrooms have dimmer switches connected to outlets and ceiling fans, which is electrically unsafe and just ...
Joel Croteau's user avatar
2 votes
2 answers
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. ...
DMoore's user avatar
  • 48k
2 votes
1 answer
5k views

LEDs in a multi-bulb fixture only dim when installed alongside a single 60W incandescent bulb

I have a 'Sputnik'-style ceiling light fixture that accepts about 12 bulbs. I installed 12 LED bulbs into the fixture. However, the fixture was just too bright with 12 LEDs, so I installed a dimmer ...
Elliot B.'s user avatar
  • 213
1 vote
3 answers
30k views

How many lighting circuits are needed in the LED era...? (US - NEC)

This is in a two story, ~1000square foot per floor building. With the advent of affordable, decent (IMHO) LED fixtures (finally!) the entire lighting load for the structure looks to be 500W - 1000W at ...
Ecnerwal's user avatar
  • 210k
1 vote
2 answers
4k views

Attaching a light fixture without a box

I'm replacing a light fixture, but upon removing the old light I discovered the wires are not in a box. Can I just anchor the mounting plate to the drywall or is a box mandatory?
Kathleen's user avatar
  • 121
1 vote
2 answers
6k 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?
Vincent saliba's user avatar
1 vote
1 answer
9k views

Need a way to rotate a chandelier *without* rotating its mounting point

I've just installed a chandelier at the bottom of a staircase. I do not like the current orientation of the chandelier. I would like the side nearest one wall to be parallel to that wall, but it ...
bobfandango's user avatar
  • 1,401
1 vote
3 answers
4k 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 ...
user20714's user avatar
1 vote
1 answer
2k views

Rewiring light fixture and switch to bring neutral line to the switch: one 12/3 switch-leg vs two 12/2 wire to bring power to switch?

I'm looking at rewiring a ceiling-mounted light fixture (a basic light bulb mount) and the accompanying switch in my utility room. It's in a very accessible part of my attic, and I'd like to do it in ...
Jason's user avatar
  • 451
1 vote
3 answers
22k 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 ...
user2060451's user avatar
1 vote
1 answer
338 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 ...
provlima's user avatar
  • 491
1 vote
3 answers
6k views

Door open lightswitch for sliding closet doors

My closets are the kind with door doors, either of which slides to the side, overlapping the other. I'd like to have the light inside the closet come on when either of the doors is opened. This is for ...
scalapeno's user avatar
  • 111
0 votes
1 answer
3k 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 ...
tkp's user avatar
  • 359
0 votes
4 answers
202 views

landscape wire in pex piping for under concrete installation [closed]

I was planning to install some low voltage landscaping lights and I needed to go under a 10 foot wide concrete driveway. Can I use a flexible drill bit to dig a 1/2 wide hole and fish some 1/2 pex ...
Zak's user avatar
  • 11