1000w DE - open hood vs closed hood?!

JimmyGrow

Member
Looking into some new 1000 DE fixtures and wondering what everyone thinks about the open vs closed hoods. I will be using them over 3 4x4 flood trays over a 15ft wall. Figured with the open hoods I could maby save a light and run 2 hoods and maby get close to the same weight. Anyone tried these? Im not opposed to 3 closed hoods just considering the options. Any opinions are appreciated.
 

zem

Well-Known Member
I have 2x400w in 3x5 no cooled hoods. I made sure that the airflow is constantly blowing upwards and out. with the result that i get, i will never have to place cooled hoods in my setup, not sure if it can manage 2k, but I would bet that it can, if done right.
 

JimmyGrow

Member
I have 2x400w in 3x5 no cooled hoods. I made sure that the airflow is constantly blowing upwards and out. with the result that i get, i will never have to place cooled hoods in my setup, not sure if it can manage 2k, but I would bet that it can, if done right.
I didn't mean vented vs non vented, looking for the comparison with E papillon style hood vs gavita style hoods. Thanks for the input though.
 

Aeroknow

Well-Known Member
I didn't mean vented vs non vented, looking for the comparison with E papillon style hood vs gavita style hoods. Thanks for the input though.
Most of my DE fixtures are these phantom open ones.
IMG_2486.PNG
I bought them for the exact reason you are considering them. I grow in rows of trays. 2 of these open fixtures per 12' of trays. Each 1k+watt fixture is lighting up 4'x6' of trays perfectly.
Cool thing about these phantom setups(the open and their enclosed) is you can seperate the ballast and run remotely. Saves height;-).
I also have a few of their enclosed fixtures. I rock those where i don't need 4'x6' coverage. Usually only when i'm just covering a single tray, as their footprint is
more square.
The bulbs that come with the phantom complete setups are just as good as ushio. I had to buy 4 of my lights with seperate components, due to stores being out of the complete setups for a minute. I put ushio bulbs in those setups from the beginning and they yield the same as the agrosun bulbs that came with the complete setups.
 
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JimmyGrow

Member
Most of my DE fixtures are these phantom open ones.
View attachment 3825768
I bought them for the exact reason you are considering them. I grow in rows of trays. 2 of these open fixtures per 12' of trays. Each 1k+watt fixture is lighting up 4'x6' of trays perfectly.
Cool thing about these phantom setups(the open and their enclosed) is you can seperate the ballast and run remotely. Saves height;-).
I also have a few of their enclosed fixtures. I rock those where i don't need 4'x6' coverage. Usually only when i'm just covering a single tray, as their footprint is
more square.
The bulbs that come with the phantom complete setups are just as good as ushio. I had to buy 4 of my lights with seperate components, due to stores being out of the complete setups for a minute. I put ushio bulbs in those setups from the beginning and they yield the same as the agrosun bulbs that came with the complete setups.
Awesome that's the info I was looking for! Glad they offer full coverage on the 12ft rows. Can the 2 open fixtures compete with 3 closed hoods as far as yield?
 

Aeroknow

Well-Known Member
Equal yields, if both were hung with their own proper spacing. They're two slightly different footprints. Open = 4'x6', enclosed = 5'x5'.
The way I would explain it further, is that those enclosed fixtures i run over single 4x4 trays(due to room layout)is sort of a waste @1000W or 1150w for that matter. Would prob be better to turn down to 750w to be most efficient.
 

JimmyGrow

Member
Equal yields, if both were hung with their own proper spacing. They're two slightly different footprints. Open = 4'x6', enclosed = 5'x5'.
The way I would explain it further, is that those enclosed fixtures i run over single 4x4 trays(due to room layout)is sort of a waste @1000W or 1150w for that matter. Would prob be better to turn down to 750w to be most efficient.
Awesome thanks a lot. I'll defiantly be giving them a try!
 
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