DIY - multi-purpose LED light

I have been following this link with great interest as many of my gigs require a "sun gun" or interview fill situation.
In my search I have found these two links,issues around colro temp etc are there but things are moving in the right direction. I just wish their ring was a bit bigger. And the flashlight might be beused with gel correction and bounce or maybe an optical solution.
http://www.theledlight.com/LuxeonLEDs.html

http://store.advancedmart.com/luledbu5w3w1.html
I think it is definitely time that less expensive solutions be available.
 
I think with LED lights you have lots of battery options. Lead-acid type batteries will work fine and given that the total current draw will be around 1-1.5A, I imagine you can get some pretty long run times compared to incandescent types. If you want small and light, you could try using the DVX battery, and that way you do away with the need for a separate charger.

With the 5.6Ah rating and a 13W power consumption - you get to run for about 4.3 hours at full power. You could also opt for different form factors. In the R/C world, Li-Po batteries are easily obtained and getting something around 2Ah is pretty easy, which should give you around 90 minutes of run time.

These Li-Po charge pretty quickly (usually around 1-hour when charged at 1C). I still like the idea of using a DVX battery due to the redundancy that it offers.

As for light diffusion of a 30-LED solution compared to a lower-LED-count array, I think you can simply space them out if you really want the diffusion. I am of the opinion that the Luxon 1-W arrays can provide the same amount of diffusion if the end-to-end physical size is the same. Not only that, I have a suspicion that the Luxeon solution will be brighter as well as more power efficient than the 30-LED strip. I probably need to run some tests to ascertain this but I'm pretty sure it will be brighter with longer throw. That much is obvious from mere eyeballing.

I estimate that you can get a very decent setup for about US$150 or so (excluding batteries). Once I get a bit more time, I should just build a proof-of-concept light and see how that works out.

Daniel Wee
 
I've been reading up about high intensity/ output LEDs as well & there are quite a few products out in the market that offers that. They are pretty small & handy for camera-mounted ENG, "one man operation" kinda shoots.

My needs are kinda different. My LED light compliments the other lights I use.

I choose to have more LED counts because it gives better diffusion. It is possible to place fewer but more powerful LEDs over the same area but I believe the results will be different. You might risk getting multiple shadows. It could be the same logic when u light 4 x 300W to make up a 1.2KW, even when u put them close to each other & diffuse them like crazy, my experience is that u will get multiple shadows.
 
I've been reading up about high intensity/ output LEDs as well & there are quite a few products out in the market that offers that. They are pretty small & handy for camera-mounted ENG, "one man operation" kinda work.

My needs are kinda different. My LED light compliments the other lights I use.

I choose to have more LED counts because it gives better diffusion. It is possible to place fewer but more powerful LEDs over the same area but I believe the results will be different. You might risk getting multiple shadows. It could be the same logic when u light 4 x 300W to make up a 1.2KW, even when u put them close to each other & diffuse them like crazy, my experience is that u will get multiple shadows & in the process lose a lot of light because of all the diffusion gels.

My design gives me about 100W tungsten equivalent which is good enough for its purpose.
 
Last edited:
You must log in or register to reply here.
Back
Top