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57 votes

LED Light bulbs burning out much sooner than expected

Yup, that's marketing. And then, these bulbs don't last long, either. They work fine for about 3 months, but then they start randomly getting dim for a minute or two, then getting bright again for a ...
Harper - Reinstate Monica's user avatar
39 votes

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

Yes. The fixture is concerned with heat. Your LED light bulb makes about 9 watts of heat. Your fixture is rated for a bulb that makes 40 watts of heat. With an incandescent bulb, 98-99% of its ...
Harper - Reinstate Monica's user avatar
35 votes

Is is safe to use LED strips that shine onto stair risers instead of directly onto treads?

I really like the way your mock-up looks! Additionally, as one whose eyes are extra sensitive to bright light, I would significantly prefer that to having any chance of light shining directly into my ...
FreeMan's user avatar
  • 47.4k
31 votes
Accepted

Is an extra 1 W that significant with LED bulbs?

There are two completely different thermal objectives First, don't set other stuff on fire. That's decided by the thermal insulation of the fixture (think: thick insulation in down lights) and limits ...
Harper - Reinstate Monica's user avatar
29 votes

Is it safe to put a 120W equivalent LED bulb in a 100W max fixture?

Yes, that is fine "like" /"equivalent", etc. are based on light output. Limitations on fixtures is based on heat output. Some power (Watts) becomes light, the rest becomes heat. ...
manassehkatz-Moving 2 Codidact's user avatar
26 votes

Is light flickering only on camera bad?

LED lights actually flicker very quickly. It only shows up in video, your eyes don't care. It's fine.
Tiger Guy's user avatar
  • 1,981
22 votes

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

SHORT ANSWER: NO PROBLEM LONG ANSWER: The maximum wattage limits are largely a function of heat. For incandescent lights, more wattage means more heat. And too much of a heat buildup could result in ...
bib's user avatar
  • 33.7k
21 votes

Seeking LED replacement bulbs for the fluorescent lights in my basement

Executive Summary Save yourself a headache: remove the ballasts and rewire the fixtures to directly power LED bulbs designed to work without a ballast. Longer Version I had exactly the same problem: I ...
ssteinerX's user avatar
  • 331
21 votes

Are integrated LEDs a riskier purchase than screw-in bulbs?

Quite simply, check the warranty. And expect to pay more for a good warranty (the fixture it applies to may also be better made.) The economics of integrated LEDs have to do with "one service ...
Ecnerwal's user avatar
  • 218k
20 votes

Are integrated LEDs a riskier purchase than screw-in bulbs?

TL;DR Rethink lighting. It isn't "bulbs" any more, it is an appliance. The key is expected lifetime. Do you know how long a major appliance, one that costs hundreds to thousands of dollars ...
manassehkatz-Moving 2 Codidact's user avatar
19 votes

How much power do LED smart bulb wireless control systems consume when the light is turned off?

The specs are out there, just not always so easy to find. For example, one Philips Hue is rated at 9.5W with max. standby of 0.2W. (Click "The bulb" on the right side under Technical Specifications). ...
manassehkatz-Moving 2 Codidact's user avatar
19 votes
Accepted

How can I install an on/off indicator for a lighting circuit?

It sounds like you have light bulbs or fixtures directly controlled by Alexa/Google Home. A better solution, though sometimes a bit more work to install, is a smart switch. With a smart switch, the ...
manassehkatz-Moving 2 Codidact's user avatar
19 votes

What is the use of alumium profile with LED strip lighting?

They provide physical support, e.g. when mounting a strip across several rafters. They provide some physical protection, e.g. against swinging garden implements. Some provide protection against ...
HABO's user avatar
  • 1,637
19 votes
Accepted

Can I use an 11 watt LED bulb in a lamp rated for 8.6 watts maximum?

Usually max watts on light fixtures is for heat build up in the fixture so returning it and getting a lower wattage one is the best. Besides the possible chance of the fixture melting or burning, LED ...
crip659's user avatar
  • 24.8k
18 votes

Why do LED Lights Flicker on Low Dimmer Setting

LEDs on AC Power Don't Like to be Dimmed. Period. (LEDs on DC can actually be dimmed quite easily - just look at an older battery powered LED device (like handheld computer games from the 1980s) and ...
manassehkatz-Moving 2 Codidact's user avatar
18 votes

LED Light bulbs burning out much sooner than expected

Advertising around LED bulbs is a big problem today, and it was even a problem back when "long life" compact florescent bulbs came out. The issue is that the actual LED will in fact last ...
JPhi1618's user avatar
  • 27.9k
17 votes

Is an extra 1 W that significant with LED bulbs?

I think you misunderstood the instruction manual. Where it reads "LED bulbs (9-Watt, Maximum)" is in the parts list. This is not giving the fixture rating. It is saying that the included ...
Richard O's user avatar
  • 171
15 votes
Accepted

Why do LED Lights Flicker on Low Dimmer Setting

The specifications of the LED lights you have say they will dim down to 10% without any flicker or buzzing. Some lights don't go down that far, and some will go even further. Based on the manual for ...
JPhi1618's user avatar
  • 27.9k
15 votes

LED Light bulbs burning out much sooner than expected

I'd like to know where you folks are getting LED bulbs with constant current sources that can be adjusted. The bulbs I've disassembled didn't bother with such niceties. They have capacitive dropper ...
JRE's user avatar
  • 422
14 votes
Accepted

Can someone explain how this makes sense electrically?

However, if I only turn off the lights breaker, and go into the switch panel with my voltmeter, I am still detecting 100V AC across the switch (with it off), even though the lights stay off when I ...
Kevin Reid's user avatar
  • 4,044
14 votes
Accepted

Is the lifespan of a led affected drastically by the type of sensor?

LEDs are the best choice for motion sensors Someone told me that the motion sensor (I guess the IR in this case) will drastically reduce the lifespan of it because it the lifespan depends on the ...
Harper - Reinstate Monica's user avatar
13 votes

Is light flickering only on camera bad?

The majority of artificial light sources flicker, but they do so with different amplitudes and frequencies. If you have lights powered by direct current (DC) from a battery: An incandescent bulb will ...
Nayuki's user avatar
  • 235
13 votes

Are integrated LEDs a riskier purchase than screw-in bulbs?

The major issue isn't even the cost or installation difficulty of replacing a single failed fixture. You also need to consider the availability of replacements. If you have multiple fixtures of the ...
Bob's user avatar
  • 338
11 votes
Accepted

LED light bulb flickering in socket, incandescent works fine

Are these the the type of motion sensors which use the neutral wire? A motion sensor needs power to work. Ideally it gets always-hot, and neutral, and then provides a switched-hot to the target ...
Harper - Reinstate Monica's user avatar
11 votes

Is is safe to use LED strips that shine onto stair risers instead of directly onto treads?

I don't see any problem with mounting them in that way. Effectively you just use them as indirect lighting. They still provide some illumination to the steps themselves, just at lower intensity. Just ...
Tonny's user avatar
  • 745
11 votes

Is is safe to use LED strips that shine onto stair risers instead of directly onto treads?

It's a bit 'form over function'. It's the kind of lighting bars trying to look 'cool' use & which three drunks a night fall down, because they can't figure out where to step. Would it not be ...
Tetsujin's user avatar
  • 11.5k
11 votes

What are the different types of LED tubes on the market?

As you problably know, electricity flows in loops. It needs 2 wires/contacts/etc. to be effective. You also may know most fluorescent tubes have 2 pins per end, or 4 total. That is more than is ...
Harper - Reinstate Monica's user avatar
11 votes

LED Light bulbs burning out much sooner than expected

My background: When I was in engineering school I worked summers at a Westinghouse light bulb plant (eventually in the engineering department). This was a very long time ago (when tungsten filaments ...
Flydog57's user avatar
  • 211
11 votes

What is this light fixture type? I have never seen it anywhere before. (North America)

The fixture type is quite common. The bulb in it now is not. That's a LED replacement (perhaps not a good one if it died - certainly crude and likely early) for a halogen bulb. Something like a T3 R7s ...
Ecnerwal's user avatar
  • 218k
11 votes

Are integrated LEDs a riskier purchase than screw-in bulbs?

Many are actually repairable. The one in my en suite is on its third power supply. That's mains powered, with the emitters on one board and an encapsulated power supply behind it. After the 2nd ...
Chris H's user avatar
  • 6,701

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