COB build out for 10×20 veg room large plants

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Hi, I intend to build a veg room for large plants 10x20 feet or 200 SF. Plants will be vegged for 2 months.

Plants will be topped once per week to help bush them out and keep canopy level and small bottom branches removed. Also will be removing large fan leaves throughout canopy to help with light penetration.

Now for the lighting questions.
Since this is for a veg only room.

(1) what would be the best color spectrum 4k? 5k? 6?
(2) How many watts per SF?
(3) COB distance from canopy?

I look forward to everyone's suggestions. Thank you.
 
gorillaglueaaron

gorillaglueaaron

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I really suggest using strips instead of cobs but it's up to you.

1. I'd say half 4000k and have 5000k with some ir diodes if possible.
2. Depends on the COBs you're using but roughly 20-25 if this is only veg.
3. Depends on the amount of heat that the COBs produce and plant stage.

I suggest using strips for a few reasons. LEDs run more efficiently when cooler so having many diodes shoved together would need a lot more ventilation to stay efficient. Also, with the diodes so close, the coverage isn't very good which isn't the case with strips.
Here's an example of a strip I would recommend:

 
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Do they work as good for penetrating larger plants as the cobs?

Does this look okay for driving each 4 foot strip
 
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M0nStarNuggety

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I too would suggest LED strip or QB setups over the COB. LED will give you the most even light spread over canopy. COB are setup like older fixture styles. Lots of light blasted from one source.
 
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Digikey giving me a may ship date. Would Alibaba be faster?

Anyway so could I pair 24 4 foot strips together off one driver? For each 5x4 area?
 
gorillaglueaaron

gorillaglueaaron

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Digikey giving me a may ship date. Would Alibaba be faster?

Anyway so could I pair 12 4 foot strips together off one driver? For each 5x4 area?
Digikey usually ships in a few days. That's weird. Maybe check other parts like lm301b strips.

Yes but You'd need a driver hat can power all of them.
 
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Amy meanwell driver that can push 1000 ma x volts to each strip would work?
 
gorillaglueaaron

gorillaglueaaron

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No way, that's not enough. I think their datasheet has suggested drivers.
 

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