Q series.H inFlux or lm301h

BuddyColas

BuddyColas

Well-Known Member
s0me0ne said:
wait for what?
will they contact me?contact me for what i didnt ask anything yet...
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Remember, Cutter actually builds their own boards/strips, and they are smoking busy.
So If you're not patient, go with Digikey or Arrow.
That said, I ordered 6 of these: https://www.cutter.com.au/product/cutter-3030cree-3k90560/
DHL was $20 something to Alaska.
They are worth the wait; for a great price and power on a very productive spectrum, they are hard to beat.
You will need a good heatsink for 50 watts.
I run them about 36 watts a strip.

As an aside, at 36 watts they put out about 10% less photons than a LM301B strip running at the same power per diode.
On the flip side, they are much cheaper...it costs a lot to be on the forefront of technology.
 
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BuddyColas

BuddyColas

Well-Known Member
sureshot138 said:
I was thinking the 1" u channel you can get home depot in 12' lenghs.
Click to expand...
https://www.rollitup.org/t/heatsinks-for-diy-led-lamps.851907/

This is an ancient article back when cobs were king. If you look at a u-channel with 1" on all faces, that would be 6" of surface times how long it is to give you total square inches. Supraspl suggested 17 sq./inches for passive cooling and 7 sq./inches for active cooling. Those numbers are for "heat" watts. So assuming 50% efficiency, a 50 watts 560 strip would have to disparate 25 watts of heat. You might cool that strip running at 50 watts with 1" u-channel, but you would HAVE to have a fan blowing on it.

I use a sheet metal u-channel with a 2.5" web and a 1.25" flange to cool a Vesta 560mm running at 50 watts (25ish watts of heat). As measured on the back of the u-channel at 50 watts, it gets 120F. Blow some air across the front face (like a fan across the canopy) and it goes down to 90ish.

Short answer: 1" too small.
 
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