muleface
Well-Known Member
you mean like this??This is where the DIY strip lights have advantage with even light and PAR values over entire canopy.
this is the conversation I was hoping to have here. I always begrudgingly accepted cobs because they allowed me to create my own light design. But I always hated the fact you were looking at in some cases upwards of $85 a light.Actually, for the same cost as a QB304 and heatsink, you're getting 20% more light, and its spread of a larger surface area. IMO, the biggest drawback of the QB's is that they are too compact.
CREE cob - $50
Heatsink - $25
Holder/reflector - $10
It seemed really pricey, the common idea on this was to run them a little lower wattage to reap the rewards of efficiency. So run them at 50-60 watts you needed, what 8 - 10 of them in a 4x4? That could run you up to $800. I moved from that to more of a google data center approach. Run lower cost cobs on cheaper heatsinks, and if and when they burn out replace them. I have 105 mm heat sinks with $6 getian cobs. With holder i'm at $15 a light. If i burn out a cob, then i replace it with another $6 cob. But I was hoping for something a little better. I did build a bridgelux strip light, see photo, and have not done a grow with that yet. I am optimistic about it. But it requires a lot of aluminum. My light has 45 feet of it. that isn't cheap.
I like the QBs, I like them a lot, but my brain tells me i would like them bigger, physically bigger so i could create a better distribution of light. So if i could run say 9 - 120s over a 4x4, that puts me at $240, plus driver. Or for the same price (more or less) i could run 3 - 304s and get pretty close to the same amount of light. But is the light distribution super critical here? would the 3 QB's putting out 483 watt total provide enough light? sorry to ramble here...
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