500 lumen LED? Updated LumiLEDs presentation

[KevinL]

Who knows, we may have a Surefire M6-LED edition sometime..

LumiLEDs is already showing off pics and talking about 500 lumen LEDs in this presentation. The document is dated August 7th.

Check out slide 53, that is one BIG, BADA55 LED with gigantic heatsink. Heck the 500 hour lifetime, just give me one of those and we can forget all about our X bins /ubbthreads/images/graemlins/smile.gif

No size reference is given, but if the screw in the picture is anything to go by, this LED should be able to fit inside a Mag head. 500 is not totally unbelievable given that X-bins today achieve something in the order of >200 lumens and they have been in production for a while. I'm sure LumiLEDs has something cooking in the lab and it smells GOOD.

Overall, fascinating presentation and well worth the time to read it.

 

[Mark2]

Thanks for the link, very interesting read! LEDs are the future, that's for sure, even so most "normal" people don't realize it yet.

 

[desmondpun]

Very interesting. In slide 88, it states LED only convert 15% of energy into light, I thought is more than that! What a surprise.

 

[KevinL]

sshhh.. /ubbthreads/images/graemlins/sssh.gif

*has mental image of Ginseng, bwaites and the hot wire crew running around LEDs tied to a bonfire with pitchforks and yelling "burn them!"* naww.. they recognize the potential too.

Having held some of the Mag+hotlips+Luxeon lights during full power runs, some get hot enough to feel like I'm grabbing a cup of coffee. A lot of heat for sure. More interesting is the projection graph indicating the lumens per watt generated. Thanks for pointing out the slide, now I understand where there is room for improvement in efficiency - more of the heat to light - and why incans require less heatsinking than LEDs, because most of the energy is turned into IR and thrown forward away from the light.

Thinking about it, if they can bridge the gap, and turn another 35% (50% total efficiency) into light, we may be looking at something like >250 lumens from a 3W Luxeon.. turn your TW0J Lux3 into a ZW0J!

(forgot to add): I did some back-of-the-envelope calculations recently. A Surefire P90 lamp delivers 105 lumens for 60 minutes running on 3 x 123. On the other hand, we can build a W-bin Luxeon V emitter, regulated using a Downboy converter (so we get more or less consistent output), that will deliver 170 LED lumens. Assume 25% for reflector/optics loss (although they claim much less), that's still 127 lumens out the business end. We'll take it as they are nearly equal to each other in terms of light output since the P90 delivers a little more than rated.

Powered at spec (700mA) with a Vf of V-bin (7.6V) = 5.32W. Assume the converter is 80% efficient (typically more, according to Wayne), 6.65W required to power the whole setup.

6.65/9V = 0.738 amps, which is quite 'tame' for the cells compared to 1.1A, not counting battery sag, which should be less than at 1.1A. At .75A constant current discharge, Duracell's datasheets indicate that they'll be able to last up to 1.5 hours. Even assuming 1AH per cell, 9W total for the battery, 9/6.65 = 1.35 hours. This is better than the P90 by a little, with today's efficiencies and the LuxV. I'm impressed.

 

[Ray_of_Light]

Seen slide 60? An Everled and a MoonLenser as example of portable lighting by LEDS...

Anthony

 

[brightnorm]

[ QUOTE ]
KevinL said:
...A Surefire P90 lamp delivers 105 lumens for 60 minutes running on 3 x 123...

[/ QUOTE ]

Non-regulated lumen figures are deceptive. That P90 is only putting out those 105 lumens for a very short period before it dims.

Brightnorm

 

[KevinL]

True, understood. What I meant was that I can run a Luxeon more efficiently than an incan, and even moreso if the P90's light output drops off, because the LuxV will still be in regulation.

 

[Size15's]

Actually Brightnorm, the SureFire 105 Lumens rating for the P90 is not the "peak" output.

Al

 

[3rd_shift]

Very interesting presentation imo.
I just went through the whole thing.

 

[tequilathursday]

Great read and very good info for this newbee. Saved it so I can soak it all in.

Thanks

 

[jtice]

That was a really cool presintation !
I liked those all the differnt lighting aplications they showed, some of those lights lookded awesome, and Bright!
Really cool what they were doing with the colors.

Lots of great technical info also.

Thanks for posting that.

-John

 

[DavidWong]

Thanks. Very educational, learnt more about LEDs in general. /ubbthreads/images/graemlins/happy14.gif
Really looking forward to brighter LED lights suitable for EDC soon... /ubbthreads/images/graemlins/naughty.gif