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13 votes

What form of electrical lighting has the smallest energy-footprint?

i signed up just so i could make this comment. THelper♦ provided a good link to a DOE report on this topic, which i was researching because my roommate is skeptical about the advantages of efficient ...
giardia's user avatar
  • 231
9 votes

Should I replace existing inefficient light bulbs?

Sort of. Consider the pay back time. high efficiency lights are expensive. Expense is, at least in part, a measure of the resources used to make it.* Replacing the fixtures in the kitchen where the ...
Sherwood Botsford's user avatar
7 votes

What to do with old, unused incandescent light bulbs

Please consider donating incandescent bulbs to a support group for diseases that can sensitize some people to light. One disease with fairly widespread support group chapters is Lupus. Lupus has ...
lemurmoon 's user avatar
6 votes

Anything similar to GravityLight that can be readily purchased?

The big advantage of GravityLight is that you can pull the weight once and then you have electricity for a relatively long period (I read somewhere it's 30 minutes). This is ideal when you need to ...
THelper's user avatar
  • 14.5k
4 votes

Why are my LED light bulbs so short lived?

We've been using CFL bulbs for more than 15 years & LEDs for about 5, and have so far had great results with most. The few we've had difficulty with early demise were either: cheapies in ...
Eileen's user avatar
  • 349
4 votes

Why are my LED light bulbs so short lived?

I haven't had this problem either. I've never even heard of it. Of the lighting that I use regularly, almost all of it is CFL or (lately) LED. I have almost no incandescent bulbs left. I prefer the ...
FreeText's user avatar
  • 269
3 votes

What form of electrical lighting has the smallest energy-footprint?

There is a lot of efficiency variation that depends on the quality of the LEDs. Cheap LEDs are no better than CFLs. High quality LEDs from brands like Cree or Philips can be over double the ...
John Spence's user avatar
2 votes

Anything similar to GravityLight that can be readily purchased?

In addition for already mentioned advantage that you only put effort once and then have a dozens of minutes of uninterrupted usage (which is important as one of the main goals was enabling reading/...
Matija Nalis's user avatar
2 votes

What to do with old, unused incandescent light bulbs

If you’re not crafty yourself, you can sell them to crafters. The sites I can think of are Etsy (you can sell supplies there) and EBay, but if you google “repurpose incandescent bulbs” that may lead ...
Maria's user avatar
  • 156
2 votes

What to do with old, unused incandescent light bulbs

I have one light that is my old bulb user. I figure it does cost more to use them but I get use out of them. I only have one light that uses incandescent bulbs. I kind of use it as a shrine to ...
Dummby Mech's user avatar
2 votes

Solar energy without the sun: Super LED light on top of solar panels?

Why not just use the power that is powering the LED lights? You cannot produce more power than you consume. That would be a perpetual motion machine and is generally accepted as not possible. ...
paparazzo's user avatar
  • 384
2 votes
Accepted

Do light fixtures with small solar panels require direct sunlight?

Solar panels receiving indirect sunlight Indirect sunlight produce around 10% to 25% of their optimal output. A solar panel of the size illustrated could optimally churn out around 4W with direct ...
Christopher Gilmour's user avatar
1 vote

What materials to use indoors to absorb sunlight and store it as heat?

The answer is very clear: since large enough quantities of phase change material with a melting point near the indoor temperatures are expensive, you want to use water. Water isn't a phase change ...
juhist's user avatar
  • 5,069
1 vote
Accepted

Simple solar light system

Solar and complicated go hand in hand. Actually power generation is generally complicated. One of the things you buy from the utility is someone else taking care of complicated. Be careful to ...
Sherwood Botsford's user avatar
1 vote

How can I tell if my light is insect friendly?

First, the amount of light you use is (close to) the minimum for the task - you're already doing far better than most. It may still be a concern as you seem to be in an area that's otherwise dark, but ...
Chris H's user avatar
  • 2,126
1 vote

I have got some lights for hydroponic growing, they run from the UK mains but have small clover shaped connectors - what are these called?

Apparently they are specialist lighting plugs (sheesh, yet another 'standard'!) and generally referred to as T5 or T8 connectors. T5 and T8 actually being a reference to the size/diameter of old ...
pperrin's user avatar
  • 145
1 vote

Why are my LED light bulbs so short lived?

It's usually not the diode. It's poor components around the diode. LEDs require a peculiar power supply, that provides constant current at slightly varying voltages. These power supplies may use ...
juhist's user avatar
  • 5,069
1 vote

Are there any bright candelabra base LED bulbs equivalent to a 60-75 Watt incandescent?

You can replace the existing "dome" luminaire under your ceiling fan with a "fitter" type luminaire. Then you can use three or four standard Edison/E27 base 100-watt equivalent LED lamps instead of ...
Satyen's user avatar
  • 111

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