I have not seen anything happening with the cree XPE led and wondered why .
so I ordered a few to have a play with and see what they would be suitable for in the bike light world.
First impressions on opening the packet was dang they are small
I had not ordered any optics because I did not know what to go for and there was not a lot of info on these about so left them for a while .
I suppose wanting some one else to experiment .
I ran out of things to do so revisited the XPE s and had a look again to see if things had changed .
But no every one was doing MCE stuff me included
so I bit the bullet and ordered some optics , I went for the Carclo 10 mm square ones thinking the XPEs are on 10 mm boards so 10 mm optics .
Again these arrived and hell they are tiny how can something so tiny deal with all these lumens.
I had a look around and found some curtain track and it looked perfect to use as a mount for these as in the pic above ,
This sparked the idea for a helmet light with a low profile and much studying this configuration and showing it to my helmet followed.
I could not seem to figure a way to do the build so desided to start from scratch .
First off what sort of beam was I dealing with so I did a ceiling shot to find out
the tapes are 1 metre long and the distance is 2.2 metres
this is 1 XPE and optic
Not bad quite a spot it was it did not throw the light every where like the MCE optics .
so the helmet light was started from a block of aluminium and My hacksaw and mini mill .
I went for 6 XPE as they hit the sweet spot of the MaxFlex driver and my 14.8 li ion batteries .
and are still quite compact
The mounts for helmets seem to lift the light up higher so I went for a simple strap and put 2 slots for the strap
also to make it universal it can take a bar clamp bolted to the bottom
and here is where it is at the moment
no wiring yet and I am waiting for a switch and power socket .
I could not wait so cobbled up a power supply and driver for a test and beam shot
It was a full moon so quite a bit of ambient light
now my 6 XPE helmet light @ 500 ma from a Nflex and 18 volt battery
Hi and Low to give an idea.
The bike is 35 metres away , the post 50 metres
the trees on the right 75 metres
and the trees at the back I have no idea but I am very impressed with this as a biking helmet light.
and on low