RS,Well I'm finished drilling all the holes. I used the 1/8" bit for the holes for the cob holders and the lens holders and 19/64" for the eyebolt holes then I tapped them with the 5/16-NC18 tap. Also I typed the wrong size in the parts list it's not 3/16"-NC18 tap lol my typing sucks. The first thing I do is install the eyebolts and then the fan
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4x4=16SF x 50W/SF = 800W. Each fixture is 400W. You will need two fixtures per 4x4 area, for a total of six fixtures each with 8CXB3590's, or 48 COB's, 12 Drivers, six fans and fan drivers, etc. RS is using reflectors he gets from KB as part of the package incl, ChipLok holder, lens, lens holder.RealStyles,
Cant tell you how much I appreciate all the info you have posted on numerous boards.
So I was thinking of doing my own DIY lights. But I have a few questions… I will be growing in a 4x4 and a 4x8 tent. I was thinking about going to a 8" x 30" heat sink to spread the cobs out a little. Running the CXB3590 v72 on HLG185h-c-700ma. Should put the cobs @ 50w and 64% efficient if I am correct… So one fixture is 16 PARw/ft^2 and two would be 32 PARw/ft^2. I know people say 30-50 watts/ft^2 but is that PARw or just watts? Also do you recommend lenses, reflectors, or neither?
Yes I understand the standard is 30-50w/ft^2 and how to calculate that. But 75w/ft^2 at 45% efficient is 34PARw/ft^2 and 50w/ft^2@64% efficient is 32PARw/ft^2. So watts doesnt really tell you how much light your plants are getting. What I am after is PARw/ft^2.4x4=16SF x 50W/SF = 800W. Each fixture is 400W. You will need two fixtures per 4x4 area, for a total of six fixtures each with 8CXB3590's, or 48 COB's, 12 Drivers, six fans and fan drivers, etc. RS is using reflectors he gets from KB as part of the package incl, ChipLok holder, lens, lens holder.
Peace
Yes I understand the standard is 30-50w/ft^2 and how to calculate that. But 75w/ft^2 at 45% efficient is 34PARw/ft^2 and 50w/ft^2@64% efficient is 32PARw/ft^2. So watts doesnt really tell you how much light your plants are getting. What I am after is PARw/ft^2.
Thanks for the Info on reflectors and lenses.There is another thread on reflectors and hte outcome was reflectors increase lumens at a target by 15% and lenses by 20%. I am working towards efficiency and wattage. Running 50W/SF veg and 45W/SF bloom.
peace
I calculated my two units I am building The veg unit,4 CXA3590, 72v, 5000k, CD bin w/C700 @ 732 PPFD and the bloom light 8 CXB3590, 36v, 3500K CD bin w/ c1400. I also hav c1050 to educe if i want at 1220 PPFD. I will be able to dim both units at will to 50% easily. peace. it is lumens we are looking for not watts. Watts is just a target to get where you want to be. design parameters to get started, and find efficiency. peace.Thanks for the Info on reflectors and lenses.
Remember Watts do not measure the amount of light your plants are getting, only consumption of energy. So don't get too caught up in watts/ft^2
Yes lumens are a better indicator than Watts but lumens still only measure visible light to the Human Eye, and a good bit of photons needed for photosynthesis are out side the spectrum for the human eye.I calculated my two units I am building The veg unit,4 CXA3590, 72v, 5000k, CD bin w/C700 @ 732 PPFD and the bloom light 8 CXB3590, 36v, 3500K CD bin w/ c1400. I also hav c1050 to educe if i want at 1220 PPFD. I will be able to dim both units at will to 50% easily. peace. it is lumens we are looking for not watts. Watts is just a target to get where you want to be. design parameters to get started, and find efficiency. peace.
if alal yopur cob's are 36v, just look at Vf forward voltage. Add them up and pick the driver that can support that. i would imagine a 185H-C1400B would work great if your 3070's can handle the amps at that level. I have mixed 72v and 36v on the same driver and it works, they just create different watts based on volts and amps running. if all cobs arwe 36v you will get consistent watts from both equally. lumens may be different tho. peace.
,I'm in RS,love the new pin heat sinks.no fans needed this time.how much do they come in at each pal?Gonna make a new tutorial for this 500w light I'm working on right now
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It's 20"x36" and will have 90 degree reflectors when I'm done.
50w This will be my best design ever. I made the frame using angle aluminum and rivets credit goes too Growmau5 and BM9AGS for reminding me of Growmau5 video lolCool
,I'm in RS,love the new pin heat sinks.no fans needed this time.how much do they come in at each pal?
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