MIT invents light-bulb that is more energy friendly over LED
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Kaarme
Let me guess: They still only last a single year in regular use, and if you drop them from the amazing height of 10cm, the filament will be broken and the whole thing rendered useless?
Energy saving wasn't the only thing first fluorescent and then led lights gave us. Anybody just a bit older has a childhood and even later full of moments of a light bulb suddenly going out in a room and needing changing. They were also very ordinary items to be bought from supermarkets in multi-packs. These days lights last forever in comparison.
BLEH!
I still use incandescent light bulbs, stocked up before the nanny-state EU banned them. Give more natural light than LEDs/fluorescents and don't give me headaches because of the flicker. The 150W I use in the "big light" is like turning the sun on!
wavetrex
You do realize that modern fluorescent and LED lamps "flicker" at frequencies above 50Khz, that is 50.000 or more pulses per second.
Unless you are from another dimension in which time flows 1000 times slower, you won't be able to perceive such a high frequency. Basically anything over 60-70Hz (and in case of some really sensitive people over 100Hz) is registered as "continuous". That is why TV's and Monitors have 60 Hz refresh frequency, and advanced models 120-144, but that's WAY more than sufficient.
But hey, good luck with your 150W filament bulbs. I enjoy my FULL-LED house for a few years already 🙂
Brisse
LED lamps don't have to flicker. It depends on how the circuit is designed. There's PWM circuits that cause flicker (depending on the switching frequency) and then there are constant current circuits that don't cause any flicker. If you buy the really cheap stuff, you can expect the former. The latter costs more. You get what you pay for. Also, some LED lamps have really good colour reproduction, while the cheap stuff is horrible. Again, you get what you pay for. Please don't bash LED technology just because you only experienced the cheap stuff, okay?
Florescent is still the best performance per dollar though, even after you factor in lifespan and electricity bill. Only big downside is that they contain toxic mercury that will be released if you accidentally break it.
mbk1969
scatman839
schmidtbag
Brisse
scatman839
Haha wow, remind me not to talk to you again.
But feel free to read http://www.nhs.uk/chq/Pages/854.aspx?CategoryID=87
http://ec.europa.eu/health/scientific_committees/opinions_layman/mercury-in-cfl/en/mercury-cfl/l-3/2-release-health-effects.htm
schmidtbag
Brisse
Yea, maybe it sounded exaggerated at first and I don't want that. I'm just asking for some common sense respect towards the stuff, especially those who have children living amongst them.
Imagine if a family has a big basket full of loose florescent bulbs lying in it and the basket is standing on a shelf. What if a child accidentally bumps into it and suddenly you have the entire floor full of glass shards contaminated with mercury, and the child is crawling around in it. Parents should be aware of these risks.
JJayzX
nick0323
I'm on Philips LED bulbs for my room, 6w each, can't go wrong really and the warranty is good.
Brisse
Backstabak
Lavcat
Fox2232
From economical standpoint LED is most economical and not toxic at all.
CCFL lights can be pretty energy efficient, but not those small bulbs, only big tubes are energy efficient. And cost wise CCFL is in normal household less cost efficient than incandescent.
Because while they can deliver same amount of light, they are more expensive and die in between 500~5000 hours based on use. That's sad part of CCFL. What many people saved on energy they paid to company making them.
Strobe? I have LEDs everywhere. I took cellphone in 240fps mode. And and only 1 out of 4 types did not strobe over time. But thing is, that none goes completely dark between strobes.
It takes up to 3 seconds to go completely dark for usual LED used in light. What cellphone camera catches is actually dimming by maybe 10~20%.
Is it possible to notice such strobe? Yes, LED has to have weak output of light not to burn-in into your eye much. And you have to notice it with peripheral vision as that is much more sensitive to light changes.
Side note, technologies used in LED lights differ. Oldest one I have is using plain unregulated AC 230V. It is Corn Type, 1/2 of AC cycle powers 1/2 of LEDs and 2nd half of AC cycle powers remaining LED connected in opposite polarity.