Diy with arrow

FmSwayze said:

What drives these prices so low? I totally missed what I need for my qb96 build

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I think arrow has a pricing algorithm, and some items they just tell their system to sell at the lowest price online. Sometimes theyve had ridiculously low prices only to change back in an instant when they realized.

FmSwayze said:

What drives these prices so low? I totally missed what I need for my qb96 build

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I have a light I built outta 4 qb96 boards running at around 200 watts. It's not the most efficient but it grows some really good shit every time. I use a xlg-240-h-ab which I would not recommend at full power it runs to hot for my liking.

Jonesfamily7715 said:

I have a light I built outta 4 qb96 boards running at around 200 watts. It's not the most efficient but it grows some really good shit every time. I use a xlg-240-h-ab which I would not recommend at full power it runs to hot for my liking.

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I plan on using running 2 on the 240 2100.

Just bought 20 of these 12, 4000k 90 cri and 8, 3000k 90 cri. You really can't beat em as far as cobs go, more efficient than cxb3590. $3.10 these are normally $20 - $30 cobs and the 90 cri versions have a nice red spec.

Cree xpg3 photo red .48¢ they're normally over $2. This is a good price imo.


Far reds xpe2 .23¢, very good price I'll buy em if no one gets em by Friday

Cxb3590 they pop up a good deal here and there, under $5 is a good deal imo. They're never at these prices for long. Folks always needin replacements.

Cobs just came in, I payed $73 for 20 cmu2287 cobs shipped, they're each 240 watt max, or 82 watt typical. I plan on running them no higher than 50 watts each.



I've been checking out datasheets looking at rated efficiency and spectrum all that shit, and ran across some interesting info. On the specs all the ratings are at a case temp of 85° C. The charts show how much better they'll perform if you keep the case temp at 25° C.

I have some 1" aluminum square tube with barbed tube connector ends on em just barely to small, I'm gonna order some 1 1/4" tube for the same thing

Going for a diy mcpcb/heatsink gonna do 3535 diodes with isolated thermal pad and a 2835 strip. There is a ton of supplies but here's kinda what I'm going for. The dielectric layer is gonna be the hardest part, I have a boron nitride coating I think will work.