Video light

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Video light

Postby ChuckyBob » Wed Dec 08, 2010 10:36 pm

After making a 4000 lumen video light for a friends dSLR I decided I would like one for my self.

I shamelessly stole the design idea but have improved upon it some what.
It use 2 1250 lumen LED with no optics. This means a wide 120 degree field of light.

Power consumption is about 30 watt. It will be driven off a separate battery cannister with the option to add a second light head.
Width is 32mm and length is about 150mm. Should cable tie nicely to a strobe arm.

Image
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Re: Video light

Postby silent solutions » Thu Dec 09, 2010 7:29 am

looks nice ,Any idea on depth rating?
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Re: Video light

Postby ChuckyBob » Thu Dec 09, 2010 7:52 am

Thanks.

No idea on depth rating but I think it would be pretty deep considering the shape and close tolerances between the aluminium and the acrylic.
I'd say the weak link is probably the gland which is 10 bar rated ( I am sure the failure point is much more).

Below is a video of my back yard using my G11 (24mm lens) and this light.

http://www.youtube.com/watch?v=rTRb_clewIY

What I really like about this design is you can extend it to hold as many LED's as you want. Not that you really need to, as it is I can fit 4000 lumen worth of LED's to this one. Its not really suitable for using out of the water though. After 2 minutes it was getting quite warm. For an above water version the aluminium would have to be more exposed with more & deeper cooling fins
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Re: Video light

Postby ChrisB » Sun Dec 12, 2010 12:06 pm

Wow nice light...
Sometimes I think I understand EVERYTHING ---- then I regain consciousness
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Re: Video light

Postby MikeB » Tue Sep 11, 2012 9:09 pm

You still using this Greg?
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Re: Video light

Postby ChuckyBob » Tue Sep 11, 2012 11:02 pm

Bink used it on his recent trip. Hopefully he will post a video of it in use.

I have made several more of a similar design for others as well.
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Re: Video light

Postby MikeB » Fri Sep 14, 2012 12:07 am

Cool. It would be great to see the vid...

Maybe I could give one a try at some point??? I'm looking at setting up another canister that I can use for a heated vest and or video lights. Have you played around with any of the Lithium Cobalt Manganese batteries?
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Re: Video light

Postby ChuckyBob » Fri Sep 14, 2012 9:19 am

You are more than welcome to give it a go. Rob will be bringing it back up when we are at the cowshed second weekend in October.

I made up a similar video light with EO wet connectors. Easy to swap battery packs or light heads/heated vests or even power them from a scooter's battery!!

I generally use standard Li Ion batteries although I do have one battery pack that uses 6x 26650 LiMnCo cells.
They are more expensive. Plus I cant get free shipping on them like I can on standard LiIon cells so they cost at least twice as much.
To be honest I have not noticed any difference in the performance but they are supposed to be a safer chemistry.
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Re: Video light

Postby ChuckyBob » Fri Sep 14, 2012 9:53 am

http://www.batteryspace.com/High-Power- ... -Rate.aspx
These are the cells I used.
Shipping is the killer though.
The 2400ma cells I normally use cost about $4.50 each free shipping. They are thinner too soits easier to build a higher capacity pack in the same spaced cannister.
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Re: Video light

Postby MikeB » Fri Sep 14, 2012 12:50 pm

Ok cool. Which are the 2400 cells that you use? How long have you been using them for and how are they holding up?

Do you use any deep discharge prevention circuits?
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Re: Video light

Postby ChuckyBob » Fri Sep 14, 2012 3:27 pm

Trustfire. I use the protected ones for backups and unprotected for packs.then add protection circuits. I'll send you a link later.
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