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Questions tagged [led]

For questions regarding lighting that uses LED (Light Emitting Diode) technology.

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33
votes
3answers
340k 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?
2
votes
3answers
5k views

How can I make a bluish “white” LED less blue?

I recently bought this white LED reading lamp. I like it a lot, but the "white" light produced is significantly blue; I'll guess its color temperature is about 5000K. I've noticed that, when this is ...
6
votes
4answers
55k views

Why are my some of my LED lights flickering?

Something is causing some of my LED lights to flicker in three locations. Here are two examples: https://www.youtube.com/watch?v=4J-g2z_YtYM https://www.youtube.com/watch?v=KlbPdvkZ-BU There are a ...
20
votes
1answer
87k 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 ...
1
vote
4answers
5k views

LED lamp keeps glowing when dimmer is turned off

(I know this question has been asked before (here), but I followed the advice recommended by the users in that thread to help remedy the problem, but the lights still glow.) I recently bought ...
11
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
8answers
18k 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. ...
3
votes
3answers
9k 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 ...
3
votes
6answers
22k views

LED light bulb flickering in socket, incandescent works fine

I have a couple of outdoor light sockets with built in motion detectors. These seem to work as you'd expect with regular incandescent bulbs- you can set a timer for how long you want them to be on ...
1
vote
2answers
4k views

Can you power LED strips from both ends?

I want to get 2 of these 500W power supplies I have several 5 metre reels of these 5050 LED strips (60 LED/m) Calculations show 1A per metre = 12 watt per metre so about 60 watts every reel. I was ...
1
vote
1answer
149 views

LED ceiling fixture certain diodes blinking

My ceiling fixture has all of a sudden stopped working properly. Half the diodes are dark and the others are blinking. Oddly, the same exact ones on each strip work and don't work. I have included a ...
0
votes
1answer
81 views

LED light needs replacing every few weeks

I have two GU5.3 bulbs in my bathroom - one of them went off a month or so ago so I bought the following 3 pack: https://www.wilko.com/en-uk/wilko-3-pack-gu53-led-345-lumens-spotlight-bulb/p/0437672 ...
25
votes
9answers
85k 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. ...
4
votes
1answer
2k views

Replacing Halogen with LED bulbs

I've just purchased some 12V LED MR-16 bulbs, intending to use them to replace the existing 12V Halogen MR-16 bulbs in my bathroom. I have found, much to my chagrin, that the LED bulbs seem to have ...
11
votes
7answers
75k 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 "...
10
votes
2answers
20k views

How can I mount an 12V transformer for LED lighting inside a wall?

The stairs to my basement has one light fixture at the bottom, and that casts a shadow on the rest of the stairs. I want to run a strip of LED lights up the crown molding or on top of the upstairs ...
8
votes
2answers
130k views

Why does an LED light turn on and off irregularly while the switch is in the on position?

We have had a LED light in the family room for several months now. In the past week it has started to act funny. We turn on the LED light and after a while it turns off and then goes back on and then ...
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 ...
2
votes
2answers
42k views

Can I connect all of my LED strips to a single power supply?

Im working on a project with LED light strips, and want to connect them all to a sd controller. The lights are ws2812b 60 LED/meter, and have 20 meters of it. It calls for 14.4w per meter @ 3 amps per ...
2
votes
2answers
2k views

LED Light Glowing when off

I have been searching the internet and StackExchange for a couple of weeks now and have not found anything that fixed the issue. I recently added a room in my basement, all new wireing, lights, ...
1
vote
1answer
230 views

LED bulbs and LED dimmer

I've read a lot about "not every LED bulb can be dimmed, always look for a "dimmable" feature". The truth is none of the LED bulb here do have the "dimmable" feature written down in the packaging. I ...
3
votes
1answer
14k views

Can dimmable (triac) LED bulbs be used on a motion sensor switch without neutral wire?

I bought a bunch of these motion sensor switches. I also want to use these dimmable LED bulbs. The motion sensors do not have a neutral wire connector. My outlets only have a live wire and it would ...
3
votes
2answers
695 views

Is there such a thing as an actual 60W draw LED or CFL bulb?

CFL and LED lightbulbs are sold as being "40/60/100 watt equivalent". They're designed and sold as replacements for a certain wattage of incandescent lamp. I have some fixtures where I want a very ...
3
votes
3answers
17k views

Replacing G4 halogen bulbs with LEDs

We've got 12V halogen G4 fixtures mounted under our kitchen cabinets and would like to use LED's instead. I found some G4 LED bulbs on Amazon, and they fit in the fixtures just fine, but if I try to ...
2
votes
2answers
1k views

Practical limits of how many LEDs can you use to replace halogen 12V?

I'm gradually replacing halogen lights at home with LEDs. We have a couple of 12V rails with a 5x35W rating when using halogens. When using the same transformer with LED's, can I use the theoretical ...
2
votes
2answers
999 views

One specific light fixture seems to be killing my LED bulbs

I have all LED bulbs in my house, the nice CREE models that look like this. They've all been great, except for the ones I put in my bathroom's four-bulb fixture. One by one, all the bulbs in this ...
1
vote
1answer
639 views

Direct Wire LED: T12 Replacement

CONTEXT An older office's 4-foot T12's are to be replaced with direct wire LEDs because the ballast cost + labor can be avoided. The instructions indicate that the hot is wired to one end and the ...
1
vote
3answers
45k views

How can I prevent these LEDs from blinking when turned off?

In a block of units we installed 240v EARTHED downlights. I believe the neutral maybe 2-3volts above earth causing the lights to flash when turned off. The fittings are provided with earth connection ...
1
vote
1answer
338 views

Why do LED lights get brighter when adding additional lights to the dimmer circuit?

I just installed new recessed lighting in my finished basement, wiring 4 fixtures with dimmable led bulbs to a dimmer switch. Additionally, 2 of the fixtures are on their own standard switch after the ...
1
vote
2answers
161 views

LED lights with a dim light in open circuit

I was installing new LED lamps on my kitchen, which seemed to be functioning well. After turning off the lights, the newly installed lamps still had a dim light, that kept itself for quite long. I've ...
1
vote
2answers
102 views

LED Bulbs - Which Measure is the Best Indicator Of Efficiency

I have been on a mission to slow replace all the bulbs to LEDs. At first, I use to judge the LED bulb's efficiency by looking at the % Energy Saving, that all bulbs have at the front of the box. ...
1
vote
2answers
1k views

How to attach 10 AWG wire to LED strip lights?

I'm running LED light strips from a location that is over 50 feet from the LED transformer. In order to account for voltage drop 10 AWG CL2 wire has been used. Questions Since the 10 AWG wire is so ...
1
vote
4answers
6k views

Is a ballast required, or merely acceptable, for this Philips InstantFit LED tube?

Rather than replace a dead ballast in a fluorescent fixture, I've decided to simply bypass and move to LEDs. However, I think I may have grabbed the wrong kind of replacement tubes the other day in ...
0
votes
4answers
126 views

Why do some lamps have different power ratings for different kinds of bulbs?

I had a lamp that broke recently after getting smashed against a wall by accident (there are now numerous exposed conductors, making it unsafe to use), so I went to the store to get a new one. I ...
0
votes
1answer
1k views

Upgrading to LED Bulbs

So I've been doing a lot of research recently regarding LED lighting, and attempting to do an overhaul of our entire house. But I've run into a few issues, and I really don't want to go back and forth ...
-1
votes
2answers
56 views

How to wire several 12V DC LEDs in serial

I want to connect about 9 LEDs (12V DC) using a simple wiring. For that I prefer serial wiring. But when I connect the LEDs in serial they don't working. When I connect in parallel, they are working. ...