1000 lumen bike light

I just wanted to share a pic of the 1000 lumen bike light I built.

One XML driven at 3000mah by an Lflex driver. Powered by one 18650. Small, light, and bright!

Impressive. I presume dual 18650 in serial configuration correct? Which tir optics did you use?

A bit steep price for the driver i must say but it's probably a nice unit by reading the datasheet.

Modes?

Thanks, the lflex is designed to run off of one 18650, which is attached to the side of the light and covered by the vinyl cover shown in the pic. There are no wires to deal with, just one neat little package.

The optic is a Ledil Rose XML lens. The lflex driver is the only one I know of that will run 1 xml off of 1 18650. It is by far worth every penny. Tons of features built in.

You can select between, 2 levels, 3 levels, or 5 levels. I've been setting them up for 5 levels on the ones that I have made.

I'm very interested in the driver. Does it provide constant current up to 3V on a single 18650? Runtime of 45min on a good 18650 is to be expected what runtime do you get?

I'm not sure how low it will provide constant current. You could send an email to George at taskled and ask him. I usually get 45 mins to an hour from one TF flame 2400mah 18650.

Nice looking light, congratilations !!

It is not common to see square shaped lenses.

1st post but have been lurking for a few weeks now, your post urged me to register. just wanted to say that is a killer looking light! wish i had the skills to make one.

how does it manage heat, since i'm not seeing any heat sinking?

not that i need any more bike lights but how much would you sell one of those for...if you did?

again, awesome light!

Nice DIY, kbark, have you posted that over at mtbrforums(DIY)?

Welcome to BLF, bloo!

Nice looking light!

Could you post some more pics? (because I'm asking how does the switch looks :D )

Thanks guys, and welcome bloo. I'm glad I lured you out of hiding!

It manages heat very well actually. The heatsink is a 1.5 inch long aluminum slug that is pressed into the housing. It's been called a "slug in a tube" light by some on MTBR. The driver also has temp protection.

I'd be happy to build one for anyone who is interested, just send me a pm for more details.

Here is a pic of the light without the battery cover installed. I don't have any good pics of the rear of the light, sorry FX-32.

Would love to see a pic of the rear (switch on the rear?) and some beamshots! How wide is the beam? Throwy? Floody?

-Garry

Yes the switch is on the rear of the light. Here is the thread on mtbr with some beamshots.

Nice beamshot! Wow! I might be interested in building one of these! Do you have a cost for selling yours? Or an idea what it would run me in acquiring parts?

-Garry

Thanks. I've made about 30 of them so far for some of my mountain biking friends, so maybe there is some potential there.

It takes about 2 hours to make each one so it's not really a profitable endeavor... just a little hobby.

Hi all!
Massive thread bump/ resurrection but are you still making these? I have been looking around for a light weight helmet light and this looks better than anything else I have seen. Did you ever try a battery on each side better burn times?

Cheers,

John

Lflex is a linear driver that uses power fet instead of 7135’s to burn off excess voltage. It’s not limited to a specific voltage as much as maximum excess wattage and won’t need a Zener mod to handle multiple cells so could be used for 1 led /1 cell, 2 l /2 c, 3 l /3 c, 4 l / 4c. 4 cells max, 3.5A max.

I am using a light with a separate battery pack, hat perfectly sits in my camel bag. I used in the past a C8, but that meant taking the weight of he battery in the head, and shorter runtime. I use a bigger battery pack now, with 2 parallel or 2s2p, depending of which light i select

what do you think of my way of dealing with bike light

I used to use a helmet light with a seperate battery on my bag but I don’t really like riding with a bag on unless I have to. I ha’ve a niterider alumina 700 lumen job and it’s good but could do with a bit more forwards punch. Also a burn time of 1:30 is on the limit for me. The OPs light here looks light enough that even with 2 batteries it would be ok but even 1 replaceable would be ok. The lumina is a sealed unit.

I don’t really have the tools/ know how to make my own but I figured this light with a new u2 or xml2 driven at 3 amp should put out just over a 1000 genuine lumens and last 2 and a bit hours with a pair or 3400 18650s. If it was not much more than 200g it would be my ultimate light. I’m amazed no company has come up with one yet.

I think the torch route is kind of the right direction but there isn’t anything that quite fits my criteria.

John

Yep, I’m still making them! They have been very popular with my local mountain biking club, almost 200 have been sold now. I’ve started using xml2’s and 3400 mah batteries on the newer versions.