How to build 300 to 900 lumen LED?

[jawnn]

Has any one built an extra bright bike light rig using 12-volt multi emitter bulbs?

I just don't want to spend over $100 for a pair. And I think that flash light beams are to narrow.

How much power would I get from 8 AA batteries? Or would I have to use a motorcycle battery?

 

[Gunner12]

300 lumen isn't that hard, take 2 decently powered P60 type drop-ins and you'll have 300+ lumen. Take 2 Seoul P7 or Cree MC-E and you have potential to go over 900 lumen. Some of the P60 type drop-in can take over 12v. The P7 is 3.7v, but there might be drivers. The MC-E can be wired for 3.7, 7.4 or 14.8v(Numbers are approximations because of Vf differences in each LED).

How much runtime do you want?
How wide a beam?
Wider hotspot? More spill? Both?

Also, picture has to be 800x600 or smaller, it's the rule.

Do you plan on making your own housing or modifying an exsisting light?

 

[pe2er]

Some flashlights have a wider throw than others. P7 Based lights are usually very useable as bikelight (900 Lm max)

Take for example this light, based on e Dealextreme Aurora AK-P7-3 SSC P7-C 900-Lumen 2-Mode LED Flashlight (2*18650/4*CR123A) on a Dutch forum

Same light is used on a recumbent here on Bike Rides

 

[jawnn]

more options please

this is great, are there more options?

 

[jawnn]

run time etc

sory about the picture size , I don't know what Im doing...

I need a wider hot spot and maybe less spill....and run time shoould be 3 hours or more.