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Questions tagged [led]

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

2
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3answers
19 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
44 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 ...
1
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1answer
27 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 ...
1
vote
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
44 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
94 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 ...
10
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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 ...
1
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1answer
42 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 ...
2
votes
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 ...
0
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0answers
40 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 ...
0
votes
2answers
65 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
23 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
69 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 ...
0
votes
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
44 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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vote
3answers
70 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 ...
0
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3answers
111 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 ...
0
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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 ...
0
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2answers
69 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 ...
0
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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
28 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 ...
0
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1answer
16 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 ...
0
votes
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
33 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
44 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
16 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 ...
0
votes
1answer
89 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 ...
0
votes
1answer
45 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 ...
0
votes
1answer
23 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 ...
2
votes
2answers
335 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 ...
0
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1answer
48 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 ...
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0answers
28 views

LED module retrofit into old quad fluorescent not working

I am replacing a bathroom "quad tube" fluorescent recessed ceiling fixture with a Halo recessed downlight LED "module" (RL560WH6940R). This module is the kind that comes with a male edison screw mount ...
0
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0answers
35 views

Flickering led under cabinet lights

I had new led dimmable under cabinet lights installed with an led dimmer switch controlling the 3 of them in my kitchen. Now they flicker throughout the bake phase when I use my toaster oven. ...
1
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2answers
189 views

Can I put a low-voltage transformer in the attic?

I'm planning a low-voltage monorail light system, fitted with 10x 7.5W 12V AC LED light heads. The manufacturer provides a "remote electronic transformer", and the installation instructions call for "...
5
votes
1answer
664 views

Can I use a regular E26 LED bulb as a replacement for a refrigerator light bulb?

The light bulb in my refrigerator burned out. It was a 40w incandescent appliance bulb like such: I'm wondering if there is any reason I can not put a 9watt A19 LED bulb such as this one (home depot ...
0
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1answer
36 views

LEDs won't turn on

I have a garage door opener which can have two lightbulbs screwed, that for some reason burn out LED lightbulbs approximately every 3 months. However, this time, the new LED bulbs I bought work ...
0
votes
1answer
32 views

How do I connect a Juno LED light to a switch when the light receives power first?

I'm trying to connect a new LED light to a new single pole switch. I have a 14/2 main power feed coming in to the LED light first then a 14/3 wire going from LED light to switch. I feel like I have it ...
0
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3answers
44 views

LED T8 tube replacement

I had replaced the two T8 Philips fluorescent tubes with two Utilitech YGA05A32-T8-18W-840-T LED tubes quite some time back. I did not change any of the ballast wiring and all worked fine. A few ...
0
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0answers
28 views

Can I run two 5-meter 5050 LED strips off one controller?

I want to hook up some 12 volt LED strips. My plans call for two (2) reels of 5 metres each, so 10 metres in all. These will be RGB 5050 type, and of course I will want to control the colors! Both ...
0
votes
2answers
45 views

How to complete this circuit

I got some decorative multi color led wire. It is broken at one place now. I need to connect the wire to complete the circuit. I am new to this and I am trying to learn. I tried twisting the wire so ...
0
votes
1answer
48 views

Replacing halogen with LED - will existing transformer work?

I currently have 5 x 20W halogen bulbs attached to two AC 12V rails, and an AC transformer (105VA). I'd like to replace existing five bulbs with five LEDs, e.g. these: 7.5W (update: 12V AC) (...
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0answers
97 views

LED lamps glow with switch off [duplicate]

My stairway LED ceiling lamps on 3-way switches glow next morning after being off all night. Is this an indication of stray voltage, bad switch or short circuit? They still glow today after 14 hours.
1
vote
1answer
134 views

Is there an advantage to single-ended LED replacement bulbs for fluorescent fixtures?

I installed 100 dual-ended LED 4-foot replacements last year and noticed that my AMZN supplier (Sunco) has replaced the product with a single-ended version. Naturally, I do not want to rewire the 100 ...
0
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0answers
25 views

Replacing outdoor Lighting with motion floodlights on a switch

So I have a outdoor light that's attached to the side of the house on the garage controlled by a switch near the garage door. The switch is a simple on/off switch I was thinking about installing an ...
1
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1answer
145 views

Minimum temperature for LED bulbs

I’m trying to pick some LED light bulbs for outdoor use. I live in Canada and we can get temperatures below -40°C. On all the bulbs I look at, there is the disclaimer: Minimum starting temperature -...
0
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1answer
80 views

laundry room fluorescent lights dim and flickering

Starting about a week ago, the fluorescent lights in my laundry room became dim and flickering. I bought two tubes from lowes (F40KB-ECO 48", I don't think that's relevant but anyway), put them on, ...
1
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2answers
36 views

Second LED bulb in each fixture burns out, what should I replace?

We have a number of inexpensive light fixtures in our house, each of which takes two bulbs. Most, but not all of these, are on newer dimmer switches (two with sliders, one with remote). We're having ...
0
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1answer
53 views

Can I replace a Maximum Bulb Wattage (Watts) 25 halogen light bulb with 5w LED light bulb? Is it safe?

I purchased 2 of these for 185sf walk in closet. https://www.lowes.com/pd/Kichler-Krystal-Ice-11-75-in-W-Chrome-Flush-Mount-Light/50355990 specs say that Max bulb wattage is 25 and come with halogen ...