Don,
The 9000 lumen is not the output. It's the bulb spec.
So, accounting for various losses you get from a flashlight, the output lumens is probably about 6000 or so.
The original design was using a 10000 lumen bulb, but because I was driving it with 21 batteries(instead of 20, which would have been the "correct" voltage), it kept blowing up the bulb.
Let me be a bit more specific.
When I turned on the light straight off the charger, then the 10000 lumen bulb would blow, because of the higher voltage. If I waited until that "initial voltage" settled down, it would be OK. But the 9000 lumen bulb was rugged enough to handle even the initial voltage straight off the charger.
The specs for the bulb are:
1) 24V, 10000 lumens, 50 hour life
2) 24V, 9000 lumens, 300 hour life
So, as you can see the 9000 lumen bulb is the more "heavy duty" one.
IMPORTANT:
The Ken 4 was not meant to be a "useful" light.
It's more of a insane exercise into seeing just how much photon power I could squeeze into a truly portable body. For those of you who have seen the banana vector, you know how small that unit is(relatively speaking), when compared to other "spotlights". It has a 4" reflector, and the body itself is only about 8" long.
For this reason, I nicknamed the light "mental ward". /ubbthreads/images/graemlins/smile.gif
Therefore, the run time is very short. If I made the light much bigger maybe with a seperate battery pack, then you could get a long time time if you wanted.
Theoretical run time is about 17.5 mins, but realistically somewhere between 10 ~ 15 mins.
But then again, most spotlights only give you a 20 min run time anyway.
Of course you could put any 24V bi-pin bulb into the light and it would work. For instance, you can use a 100W, 24V bulb, which is "only" 2900 lumen spec, and you would get about 45 ~ 50 min run time.
The truly versatile performer is the Ken 2.
The Ken 2 is on par with other HIDs such as the McCulloch.
Mr. Ted Bear, please post the Ken 2 pictures as well. /ubbthreads/images/graemlins/smile.gif
Both the Ken 2 and Ken 4 are NOT HIDs. They still use "old" halogen technology. But they are the "best" of the halogens available.
