Can you double check this diy cob order for me?

matman4444

Well-Known Member
After reading all these threads I decided I should just build a cob light that seems to be so popular.

Attached a picture of my cart, just looking for opinions before I buy it, if I've missed anything or if there are better options around this ~$200 price point.

Aside from this, the local stuff I'll buy is just things for a frame, wire, and a plug?

Thanks for the help!Screenshot_20170921-110404.png
 

SouthCross

Well-Known Member
If that BJB holder is plastic. It'll suck. Ideal brand holders are metal. I'd save my money on the reflectors. Wait till you see the spread the bare chips make. Then consider reflectors if you want.
 

SouthCross

Well-Known Member
Don't forget the screws to mount the holders to the sinks. The size for the 120mm sinks I bought took M6-.50 x 6. Metric, 'Pan Phillips Machine' screws. Lowe's has them in packs of 14.
 

matman4444

Well-Known Member
If that BJB holder is plastic. It'll suck. Ideal brand holders are metal. I'd save my money on the reflectors. Wait till you see the spread the bare chips make. Then consider reflectors if you want.
I have a small tent, 20"x32" do you think I'll need them in that size space?
 

SouthCross

Well-Known Member
I have a small tent, 20"x32" do you think I'll need them in that size space?
Download the datasheet to the chip. It'll have a graph showing the angular radiation pattern. It also will tell you how to handle the chips. Don't touch the front. It's supposed to be by tweezer only. Lots of info in the datasheet.

Reflectors are not needed in a smaller space. The light bounces off the walls. If you were growing in a warehouse to where the plants are out in the open. Then reflectors would help.
 

CobKits

Well-Known Member
If that BJB holder is plastic. It'll suck.
theyre fine

Wait till you see the spread the bare chips make. Then consider reflectors if you want.
possibly good advice as easy to add later

Don't forget the screws to mount the holders to the sinks.
theyre included with the heatsinks (both for chip mounting and mounting sinks to rails)
M3 and M4 on those ones

I have a small tent, 20"x32" do you think I'll need them in that size space?
no

Download the datasheet to the chip. It'll have a graph showing the angular radiation pattern. It also will tell you how to handle the chips. Don't touch the front. It's supposed to be by tweezer only. Lots of info in the datasheet.
all cob chips radiate similarly. the cobs themselves are pretty tough, if your reasonable with them and not pressing down hard on the LES they should be fine. only cobs ive ever seen damaged by handling are the giant 38mm chips with 100s of diodes squeezed in there
 

nogod_

Well-Known Member
That avatar....:clap:

Kirilenko is such a dbag

After reading all these threads I decided I should just build a cob light that seems to be so popular.

Attached a picture of my cart, just looking for opinions before I buy it, if I've missed anything or if there are better options around this ~$200 price point.

Aside from this, the local stuff I'll buy is just things for a frame, wire, and a plug?

Thanks for the help!View attachment 4014138
 
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