high powered LED's

On 2006-01-06, Marty (aka Bruce)
was almost, but not quite, entirely unlike tea:

Quoted message said:

geoffs said:

ghostgum said:

It appears you can now get a 7W LED flashlight
http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2328

I am impressed with the output of this, 200 lumens vs the 120 lumen
output of the 5w Luxeon. Strange that Luxeon dont have it listed on
their website.
I think I'll stick to the 21W HID Stadium III which uses this 'globe'
(http://tinyurl.com/8qfyh) for the 1850 lumen output. LED's seem to be
great for being seen but it's good to see where you are going.

Geoff

My guess is that it's an overdriven 5 watt one and they've just
multiplied up the Lumens and then added a bit to say theirs is the
brightest in the world. I'd be skeptical of the claims unless I saw more
supporting evidence of their measurements.

And it's not like luxeons have a large MTBF anyway. Overvolting them
is a good way to bring that down further.

--
TimC
Theoretically one might have been wearing pants at work.
-- Anthony de Boer in Scary Devil Monastry

On 2006-01-08, geoffs (aka Bruce)
was almost, but not quite, entirely unlike tea:

Quoted message said:

We do have an LED as a backup for when I've forgotten to charge the
battery. One thing that I have noticed though is that cars are much
more prone top pulling out in front of when using the LED than the HID.
With the LED car drivers know that it is a bike approaching whereas with
the HID they must think its a motorbike and just wait until we are past.

Anyone else with this experience or is it just us?

Yep. I don't think I've ever had a driver pull out in front of me at
night with my halogens -- even the 5Wer. And distances far greater
than I can get away with in the daytime.

That's not what I had with all my LED torches.

Quoted message said:

The 21w HID globe is only rated at 350hrs MTBF on the Welch Allyn site.
The 10w has a 1000hr rating.
So I had better start saving up for the $239USD for a new globe.
Bugger!

350hrs is not too bad. That's 2 years of commuting for me. It's not
as terrible as my halogen globes, but then again, my halogens are a
tenth the cost. OK, so HIDs do suck 🙂

--
TimC
An optimist thinks we are living in the best of all possible worlds. A
pessimist fears this is true. --unknown