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Questions tagged [led]

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

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25 views

Are there any dimmable 3 way LED bulbs? [on hold]

There are dimmable 3 way LED bulbs, and 3 way LED bulbs, but are there any dimmable 3 way LED bulbs?
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1answer
26 views

LED's emitting high pitched noise

I have some LED lights hooked up to a trophy cabinet and for some reason it's emitting a fairly loud high pitched noise, does anyone know what this could be?
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1answer
27 views

Is it possible to drive led strips using a halogen driver?

I have a 12v halogen setup in my kitchen which I'm looking to replace with 12v led strips. I have everything working and the light strips work, until I unplug the halogen lamps at which point the leds ...
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2answers
59 views

Is untreated aluminium suitable as an LED heat sink?

I'd like to have a 5m LED strip lighting directed upwards from around 1m height (would be behind a desk and other furniture). My idea was a simple U shaped aluminium profile (so it can be screwed to ...
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1answer
27 views

Can I add copper wire led lights to existing 12V Landscape Light Transformer

I have an existing 12V low voltage landscape lights set on a transformer. I have a 66ft copper wire LEDs that came with a 5V adaptor. Does this have to be plugged in separately; or can i connect it ...
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2answers
78 views

Looking to replace light switches - 2x blue, 2x black wires

I'm looking to replace a light switch. Upon opening up the switch, I'm greeted with this: I would like to replace with this: For context, this is a commercial in-conduit wiring. I want to replace my ...
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5answers
175 views

Plastic-on-plastic lubricant that wont leave a residue?

I am working on an outdoor LED lighting project where I'm making my own rope lights to hold up to the elements. I am using waterproof LED strips which are surrounded in a plastic "jelly-like" material ...
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1answer
42 views

Color adjusting LED ceiling light intermittent issues

I recently installed CE color changing (5 temperature settings) LED all-in-one fixtures in my bedrooms and have been having an odd issue. I wired four fixtures with 12/2 Romex in parallel out of a ...
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1answer
37 views

How do you connect a long string of LED strips to power at both ends when including a controller?

I'm looking to use 24v LEDs (https://smile.amazon.com/dp/B01LYNJTBN/?coliid=I359TOA9WZGE2V&colid=3HRP4V1TLBJ6P&psc=0&ref_=lv_ov_lig_dp_it) along my fence to help light my pool area. I ...
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2answers
103 views

Several LEDs and LED bulbs in my house are failing at the same time and way before their estimated lifespan

I've never had this happen to me and, now, in a span of 1 month, it's already happened 4 times... The following 3 LED bulbs and 1 LED strip have become unusable: An Ikea Ledare 600lm spot LED buld (...
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1answer
36 views

How can I tell if a dimmer switch is LED compatible?

I have recently put some smart LED bulbs into my ceiling fan (Lifx if the brand matters) and there is a bad humming noise. Previously there was some humming in at least one of the LED bulbs (they ...
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2answers
47 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. ...
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2answers
63 views

How to know if I can use LED ceiling light bulbs?

I'm renting a flat and need to replace some light bulbs. The bulbs I need are 12V MR16/GU5.3 bulbs. How can I tell if I can use LED bulbs as opposed to the halogen ones that are there currently? If ...
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1answer
38 views

LED Flat panel wiring — Type NM/Romex or Lamp Cord

I purchased several LED flat panel fixtures that came without wiring instructions. I’m using suspension cable kits to hang the lamps from an open basement ceiling with fiberglass insulation and TJI-...
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2answers
100 views

Single pole switch with lighting “zones”?

Somewhat of a challenge... I'm going from a single light to recessed lighting in my studio condo. There is a single pole switch that this single light is currently connected to. I'm going to install ...
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0answers
34 views

How to wire an entire room / kitchen with LED light strips?

As the question suggests, I'm looking into adding LED light strips throughout the kitchen (over cabinet, under cabinet, and kick -- I think under the countertop would be neat, but harder to hide). ...
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3answers
57 views

Dimming multiple led light bulbs (parallel or in series)

I'd like to install 5 dimmable led bulbs. I'm trying to find how to connect them. But I can't get a clear answer. I can get information of the benefits of wiring leds in series/parallel but none of ...
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3answers
32 views

How much wattage to choose for LED light when replacing flourescent light with LED?

Suppose I have a circular 22W flourescent light at home and I want to replace it with LED of similar brightness. How much wattage should this LED have? Any rule of thumb as guidance? The salesman at ...
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2answers
51 views

How to on this retrofit led recessed light

That's the inside of my can on my recessed lighting but the new retrofit led plug doesn't fit that. What do I have to do in order to retrofit a new led light in that old fixture to avoid me going into ...
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1answer
28 views

LED light is on when it should not be

I have 3 12v LED under cabinet lights that I plan to install. The final install goal is to have the line power (120v) controlled by a pre-installed light switch (1-way) which currently operates 4 pot ...
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1answer
40 views

LED Light in Ceiling Fan only works with a non-LED next to it

I have a Harbor Breeze ceiling fan with two light ports and a remote control. The lights are e12 (candelabra) base, but I need some brightness. I just bought some 12W LED bulbs (100w equivalent) and ...
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2answers
45 views

is it permitted to invert the line/neutral polarity on an AC->DC power supply?

I'm trying to work through the parts required for an LED strip light project. I'm considering this power supply as the driver, driving about 20' of 24V LED strip. I've worked with similar but ...
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5answers
96 views

LED Bulbs won't fit my garage door opener

These are the last bulbs in the house that I have not been able to change over to LED. You might be thinking to yourself, they only turn on for 1 minute, what is the big deal. I've started to notice ...
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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 ...
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1answer
45 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 ...
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1answer
50 views

How do I know what LED bulbs are safe to use in fixtures that are part of construction?

In a recent question, I asked about different power ratings for LED and traditional incandescent light bulbs. In the accepted answer, the author explained that the different ratings are due to heat ...
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0answers
41 views

both led lights don't turn on

I just replaced a switch with an led compatible switch (lutron). It switches on two led lights. Currently i have one philips led bulb and one cree led bulb on the switch. I also figured out that the ...
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2answers
68 views

Running 12V Wire Behind Walls for a LED Stair Light?

I'm interested in lighting a stairwell in my house using a red LED strip. I have a nearby AC outlet and plan on using a typical 12V power supply from the AC outlet. I know that class 2 wire is ...
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0answers
34 views

Flickering started: All 4 LED bulbs on dimmer switch flicker in unison

All 4 LED Recessed lights on dimmer switch #1 just started flickering in sync (sometimes) starting 2 days ago. 4 years with no problem 4 other LED's on a DIFFERENT dimmer switch #2 (but same circuit) ...
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2answers
100 views

Why do some LED lights go dim while others go out completely?

When dimming LED lights with an LED dimmer, why do the LED lights at the end of a string of lights go off when LED lights at the beginning of a string of lights go dim but stay lit? This application ...
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1answer
26 views

Powering 12V LED strip thru European hinges

This is something im planning to do and in fact already half way into building it. The idea is I'm installing sections of LED strip behind the cabinet door and its on the door itself. This door is ...
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0answers
49 views

Under cabinet LED lighting on opposing sides of the kitchen - no wire in between

I would like to put LED lights under the cabinets of my kitchen, and have them controlled by wall switch. Here is the situation, I have cabinets on opposing sides of my kitchen (facing each other). ...
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3answers
74 views

Is it safe to use this dimmer on LED bulbs?

I have a question about dimmer switches for LED flood lights. My kitchen has six floodlights on a Lutron toggler dimmer switch, model AY-603P. http://www.lutron.com/en-US/pages/SupportCenter/support....
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0answers
55 views

Exterior LED floods worked for a week

Bought 4 new Philips 120-Watt Equivalent PAR38 floodlight bulbs and installed in double flood light fixtures at corners of house. Worked great for a week... Now when I flip the on switch, none of the ...
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3answers
113 views

LED bulbs in my old house are dying prematurely

I installed about 20 LED bulbs in my house when I moved in two years ago. Since then at leave 5 of them have died. None of the bulbs are on dimmer switches. However, my house is more than 100 years ...
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4answers
103 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 ...
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2answers
70 views

Can I connect eight LED strip lights to the same power source?

I want to run led strip lights around my son's bedroom. I have narrowed my choice down to 3528 rgb and 3528 white. I will need a bout 4 strips in each color. My question is can I run these from the ...
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0answers
33 views

Why do LED bulbs in my three-bulb fixture remain on unless one is incandescent? [duplicate]

I have a three bulb light fitting that worked fine with 40 watt golf ball bulbs. On removing the bulbs and inserting the first 5.5 watt led the bulb illuminated while the fitting was turned off. This ...
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0answers
33 views

Why doesn't one of my light fixtures work when I install LED bulbs?

I have 2 light fixtures in the bathroom. Each fixture takes 2 light bulbs. I replaced the light bulbs with LED light bulbs, but only one of the fixtures' lights works. The other one the lights do not ...
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1answer
18 views

ELV fixture + Maestro ELV dimmer does not dim, it simply switches

I just installed a Maestro ELV dimmer connected to a LED ELV-compatible fixture (WAC lighting). The fixture does not dim however, it is 100% on at all dimmer settings and shuts off when the dimmer ...
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1answer
21 views

Can I tell whether a LED driver/bulbs are dimmable without damaging them?

As mentioned in the answer to this question: LED bulbs and LED dimmer we can't trust a LED driver / LEDs to be dimmable if it doesn't say so explicitly. However, only some companies offer explicitly ...
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0answers
34 views

Light and fan remain constantly on after changing bulbs to LED [duplicate]

Recently replaced old 40W ES bulbs to LED ones with the same fitting. However this causes the light and (timer) fan in the bathroom to remain consistently turned on despite the switch being in the off ...
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2answers
46 views

Intermittent Flickering LED Strips

I have 10 separate LED strips behind a dropped ceiling feature. Each seems to have its own driver and none appear to be connected to each other except via the same power source and switch. Two that ...
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0answers
17 views

LED flashing on Hot start

I have kitchen lights using 12v 5w leds (GU 5.3). There is a 30w 12v led power supply. When switching off, then back on, the lights flash. Any ideas please. There are 2 sets in the room, they both do ...
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1answer
136 views

Why are the LED lights in my ceiling fan suddenly dim?

Installed ceiling fan with LED lights. Circuit has three way switches no dimmers. Lights worked fine for a 1-1/2 months, but then turned on one morning and lights are dim. Fan has a remote to turn on ...
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1answer
46 views

Wiring a garage door sensor

Looking to wire an LED light indicator for my garage door. I'm in no way a lighting/electrical expert and I could use help. I do repair copiers for a living. Home auto mechanic rebuild motors etc. I ...
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1answer
31 views

Low-voltage LED Light string flickers when turned on, flickers go away after 2 mins

We have several low-voltage LED light strips in our light-up cabinets in the kitchen. They have all worked fine for 3 years. One of them has now started to flicker for a couple of minutes when turned ...
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2answers
341 views

LED lights cause appliance failure

Here is a fun one. I installed 2 LED bulbs into my Genie garage door opener and it caused the microwave to lose power. They are both on the same circuit. When I tested the voltage at the microwave ...
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1answer
53 views

T8 LED Burn-in Process

Direct Wire 4ft T8 were purchased and installed. Is there a rule of thumb or recommended process to burn-in the bulbs? Is there a good test or process to weed out 'infant mortality?'
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0answers
37 views

Is there an LED-compatible dimmer switch that can work in series with a second dimmer?

I just installed 3 LED shop lights in my workshop (ok they're actually meant as bathroom lights, but the price was right). They are wired in parallel, with a master switch in front of everything (in ...