Hi guys,
got my hands on an Arrow 12 from greenforce for very little money and thought it would be a good host to mod.
The light head is a halogen head but I can't find any picture of this head (4 thin o-rings around the front of the head) on the internet so I'm assuming this must be one of the earliest light heads (first standard 12?) made by greenforce.
Some dimensions:
OD: 54mm
total height withouth the connector at the back: 78mm
lens thickness: 10mm
lens diameter: 49mm
cilindrical space under the lens: 7mm deep, ~44mm diameter, after that: conical
available depth including conical part: ~25mm
Anyway, the halogen bulb is dead so I pulled it out from the back of the head. The bulb is fixed to the connector at the back of the head, the reflector stays inside the head. I then removed the O-ring that keeps the lens in place. The lens is sealed by 2 o-rings around the lens so I used a wooden stick to push the lens out from the back (needed a hammer though to get it moving).
This is the result:
(forgot to add the reflector to the pictures, sorry)
From the dimensions above, you can guess that his won't be a very easy mod because there is little space and it won't be easy to make a 'press-fit' heatsink.
I'm currently thinking to just put a single XM-L or so in and making a 44mm heatsink that steps down to increase the amount of metal and to be able to drill a hole in it and put the LED in the hole but I haven't figured out how I'm going to get this done and also leaves the question of where to put the driver.
Another idea was to make some small heatsink and make it press-fit for the hollow tube at the end of the conical part which would give me enough space for a driver and a reasonable reflector or optic, but I'm not sure if that would give me enough thermal capacity.
A third option I'm considering is to make a video/photography head and use multiple LEDs withouth optics (less space required).... but I don't have an underwaterhouse for my camera.
If this head doesn't work out, no problem. I have a broken HID head as well which is probably a better candidate to mod but I want to see what I can do with this head as well.
any suggestions for a mod or clever ways to use the liitle space?
Johan
got my hands on an Arrow 12 from greenforce for very little money and thought it would be a good host to mod.
The light head is a halogen head but I can't find any picture of this head (4 thin o-rings around the front of the head) on the internet so I'm assuming this must be one of the earliest light heads (first standard 12?) made by greenforce.
Some dimensions:
OD: 54mm
total height withouth the connector at the back: 78mm
lens thickness: 10mm
lens diameter: 49mm
cilindrical space under the lens: 7mm deep, ~44mm diameter, after that: conical
available depth including conical part: ~25mm
Anyway, the halogen bulb is dead so I pulled it out from the back of the head. The bulb is fixed to the connector at the back of the head, the reflector stays inside the head. I then removed the O-ring that keeps the lens in place. The lens is sealed by 2 o-rings around the lens so I used a wooden stick to push the lens out from the back (needed a hammer though to get it moving).
This is the result:
(forgot to add the reflector to the pictures, sorry)
From the dimensions above, you can guess that his won't be a very easy mod because there is little space and it won't be easy to make a 'press-fit' heatsink.
I'm currently thinking to just put a single XM-L or so in and making a 44mm heatsink that steps down to increase the amount of metal and to be able to drill a hole in it and put the LED in the hole but I haven't figured out how I'm going to get this done and also leaves the question of where to put the driver.
Another idea was to make some small heatsink and make it press-fit for the hollow tube at the end of the conical part which would give me enough space for a driver and a reasonable reflector or optic, but I'm not sure if that would give me enough thermal capacity.
A third option I'm considering is to make a video/photography head and use multiple LEDs withouth optics (less space required).... but I don't have an underwaterhouse for my camera.
If this head doesn't work out, no problem. I have a broken HID head as well which is probably a better candidate to mod but I want to see what I can do with this head as well.
any suggestions for a mod or clever ways to use the liitle space?
Johan