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The LED technology used in that bulb seems a little dated. I believe it's using Phillips' Luxeon Rebel LEDs. Looking at the pictures, there's 3 sections and e
by jim_h 15y ago
The LED technology used in that bulb seems a little dated. I believe it's using Phillips' Luxeon Rebel LEDs.
Looking at the pictures, there's 3 sections and each section has 6 Rebel LEDs. Total of 18 LEDs. All for output of 800 lumens.
A recent LED flashlight can produce 800 lumens with just 1 (CREE XM-L) LED. For example, http://www.fenixlight.com/viewproduct.asp?id=141 http://www.fenixlight.com/viewproduct.asp?id=141 If you want a warmer white tint, it's a little less lumens, but you can always use 2 LEDs..
LEDs have come a long way in the last couple of years. It's just unfortunate that light bulb manufacturers do not make and sell new models as quickly as flashlight companies. There seems to be a new model every week with the latest LED for crazy light output.
Another example, http://www.fenixlight.com/viewproduct.asp?id=149 http://www.fenixlight.com/viewproduct.asp?id=149 It does over 2,000 lumens with 3 LEDs!! This is just one company. There are many more that also have crazy flashlights.
If you want to learn more about LEDs or flashlights, head over to http://www.candlepowerforums.com/vb/forum.php http://www.candlepowerforums.com/vb/forum.php
- ars 15y agoThe reason they are so bright is they don't need to worry about color accuracy. I bet these bulbs are very blue. Also, their efficiency is about 57.8 lm/w which isn't very good (it's not terrible - but once you try to get a good color the efficiency drops a lot). http://www.wolframalpha.com/input/?i=800+lumens+%2F+%288*2500mAh+*+1.5+volt+%2F+%282+hours+%2B+10+minutes%29%29+in+lm+%2F+w http://www.wolframalpha.com/input/?i=800+lumens+%2F+%288*250...
- weeny 15y agoThey aren't blue at all, they are 2700K - and this is a big part of the reason they are 57.8 lm/w. The remote phosphor, while creating a very uniform photometric distribution, reduces the overall light output by filtering the very monochromatic blue light into warm white light.
- mixmastamyk 15y agoFrom the article it appeared that the selling point of the bulb was omnidirectional light at a certain power. In that case a large number of weak leds makes sense.
- weeny 15y agoPhilips updates the technology in the Rebel LEDs several times a year. In fact, they have on several occasions demonstrated record-breaking output in this form factor up until earlier this year. The reason that flashlights are updated so much more frequently than light bulbs is that flashlights don't require any consumer safety ratings. Where a company can release a battery-powered flashlight with no safety testing, a light bulb running on line voltage has to be brought through a rigorous UL, CSA and FCC standards compliance testing.
- jim_h 15y agoYes, you are correct. I overlooked that important fact. It'd still be nice if they moved faster.