brad72
Newly Enlightened
Hi all.
I have made a smaller light to my usual (7 up xpg) and went for a double XML.
The prototype light pictured below was made with a hipflex driver with a maximum drive current of 2.8A using the 14.8v packs I had in stock but the next version will use a Lflex driver with a 7.4v pack
The round driver housing on the end has a stat led fitted to give some warning when the battery is getting low and I am still tossing up making it from carbon fibre for something different. I made the driver housing removable to give the option of mounting the driver away from the light as a puck which would be handy for a helmet light. If I use the Lflex driver then this would work well as the driver will not need to dissipate away as much heat as the input voltage is much closer to the output voltage.
The optics I used are the Ledil CRS square optics designed for XR-E leds. The current light uses a spot and an oval optic with the oval beam parallel to the ground to give width without the top and bottom flood. I'll post some beamshots later.
The light has a remote switch which can be mounted on the bar beside your grip or a longer one which can be attached to the strap of you camelpack or the side of the helmet. When used as a helmet option I usually mount the stat led in the switch so it can be easily seen as obviously you can't see the housing once on your head.
Weight wise at present it sits around the 160g mark but I would like to shave a bit more off without compromising the thermal performance.
As for output well the 7 up still out performs any light I have built but this little twin xml is very impressive. The 7 up draws 2.2 amps on hight were as the twin xml is around 1.2 amps when driven @ 2800mA.
Here's a few photo's. Note, ignore the bluetac handlebar mount, it was just for the photo
I have made a smaller light to my usual (7 up xpg) and went for a double XML.
The prototype light pictured below was made with a hipflex driver with a maximum drive current of 2.8A using the 14.8v packs I had in stock but the next version will use a Lflex driver with a 7.4v pack
The round driver housing on the end has a stat led fitted to give some warning when the battery is getting low and I am still tossing up making it from carbon fibre for something different. I made the driver housing removable to give the option of mounting the driver away from the light as a puck which would be handy for a helmet light. If I use the Lflex driver then this would work well as the driver will not need to dissipate away as much heat as the input voltage is much closer to the output voltage.
The optics I used are the Ledil CRS square optics designed for XR-E leds. The current light uses a spot and an oval optic with the oval beam parallel to the ground to give width without the top and bottom flood. I'll post some beamshots later.
The light has a remote switch which can be mounted on the bar beside your grip or a longer one which can be attached to the strap of you camelpack or the side of the helmet. When used as a helmet option I usually mount the stat led in the switch so it can be easily seen as obviously you can't see the housing once on your head.
Weight wise at present it sits around the 160g mark but I would like to shave a bit more off without compromising the thermal performance.
As for output well the 7 up still out performs any light I have built but this little twin xml is very impressive. The 7 up draws 2.2 amps on hight were as the twin xml is around 1.2 amps when driven @ 2800mA.
Here's a few photo's. Note, ignore the bluetac handlebar mount, it was just for the photo
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