Opinions on CMH lighting for flower

Tas devil

Tas devil

Well-Known Member
Thanks for reply dude..hmm ive been thinking if say 1 light has a foot print of 3x3 .3 light wont cover a 5x5 you could stager them better but there would b one area that that gets less than the rest ...am i right.so in theory id need 4?.like 4 overlaps all areas like in my sativa creative pics bongsmilie

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ttystikk

ttystikk

Well-Known Member
Tas devil said:
Whats the amp draw on sunplix fixtures
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Use the 315W system with square wave ballast. The ballast is the source of the improvement in efficiency.

Use one lamp for each square yard/square meter.

Having more smaller light sources is better than fewer bigger ones due to improved light distribution.
 
Tas devil

Tas devil

Well-Known Member
Funny you mention that. ive had my eye on purchasing solistek and a guy asked today on there facebook site with a Q reguarding there high fequency lightand solistek saying that high is better than square wave because the sun omits high frequency blah blah blah etc..

Si 2 315s will work in 1.5 x 1.5mtr room..ive used all 16mm thick laminate..huge 710 exhaust and 315 inlet phresh fans
 
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ttystikk

ttystikk

Well-Known Member
Tas devil said:
Funny you mention that. ive had my eye on purchasing solistek and a guy asked today on there facebook site with a Q reguarding there high fequency lightand solistek saying that high is better than square wave because the sun omits high frequency blah blah blah etc..

Si 2 315s will work in 1.5 x 1.5mtr room..ive used all 16mm thick laminate..huge 710 exhaust and 315 inlet phresh fans
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CMH won't run on high frequency ballasts.
 
Logan Burke

Logan Burke

Well-Known Member
I think he's just asking why the hell Solistek is advocating high frequency for CMH lights, I don't think he's agreeing with it or anything. Which is definitely what I'm wondering after reading that.
 
Flowki

Flowki

Well-Known Member
SunPlix CMH said:
GE has 400W CMH bulb, and higher power CMH (single arc) bulbs will be available soon.
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Why the jump to 400W+. One of the main benefits of cmh is the alternative to high W bulbs that give poor light distribution. Seems like a step back unless I am missing something?.
 
SunPlix CMH

SunPlix CMH

Well-Known Member
Flowki said:
Why the jump to 400W+. One of the main benefits of cmh is the alternative to high W bulbs that give poor light distribution. Seems like a step back unless I am missing something?.
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A 315W CMH can replace a 600W HPS/MH. To replace a higher power HPS/MH and get more PPF, a higher power CMH bulb is needed. Other option is to use two 315W CMH bulbs to replace one 1000W HPS/MH.
 
Flowki

Flowki

Well-Known Member
SunPlix CMH said:
A 315W CMH can replace a 600W HPS/MH. To replace a higher power HPS/MH and get more PPF, a higher power CMH bulb is needed. Other option is to use two 315W CMH bulbs to replace one 1000W HPS/MH.
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A 315 can't replace a 600 dimension, but two 315's can with plenty juice left over.

Why is a higher powered cmh needed to replace a higher powered hps?. You need 2 cmh for one original 600 dimension. If a person was using 2x600 in a 3x6 they don't need to use 4x 315 cmh.. they only need to use 3 and could still push that dimension out to around a 3x8 if they wanted to, thanks to multiple light sources. You can replace 1200W hps with 945W cmh as is. You get similar or increased yield and increased quality.

Creating cmh bulbs at size of hps is losing a big part of cmh efficiency from multiple light source even intensity spread. I just don't get why stepping back up to big light sources is a good thing, aside from it being easier logistically.
 
SunPlix CMH

SunPlix CMH

Well-Known Member
Flowki said:
A 315 can't replace a 600 dimension, but two 315's can with plenty juice left over.

Why is a higher powered cmh needed to replace a higher powered hps?. You need 2 cmh for one original 600 dimension. If a person was using 2x600 in a 3x6 they don't need to use 4x 315 cmh.. they only need to use 3 and could still push that dimension out to around a 3x8 if they wanted to, thanks to multiple light sources. You can replace 1200W hps with 945W cmh as is. You get similar or increased yield and increased quality.

Creating cmh bulbs at size of hps is losing a big part of cmh efficiency from multiple light source even intensity spread. I just don't get why stepping back up to big light sources is a good thing, aside from it being easier logistically.
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All of our customers said our 315W CMH grow light replaces a 600W HPS. Maybe the other brand 315W CMH can't, I don't know.
Please see our customers' posts here: https://www.facebook.com/groups/248519675519386/
 
Flowki

Flowki

Well-Known Member
SunPlix CMH said:
All of our customers said our 315W CMH grow light replaces a 600W HPS. Maybe the other brand 315W CMH can't, I don't know.
Please see our customers' posts here: https://www.facebook.com/groups/248519675519386/
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If comparing a cheap open wing hps to cmh in a decent hood then sure, I could see the lines being closer single light v lght. In equal quality hoods it isn't a competition, a single hps will win in dry weight (quality aside).

I way prefer cmh over hps personally but it isn't twice as good, being what your watt comparison figures state.
 
GroErr

GroErr

Well-Known Member
I used 315's for a couple of years, great tech and still is comparing it to any other bulb tech. However, there's no way a 315w CMH (Philips) bulb can replace or equate the output of a 600w hps (unless the user didn't know what they were doing in the first place). 450w maybe if you must compare. A single bulb with a decent hood (like a Sun Systems) running vertical can cover off a 3x3 really well ime, 2 hoods side by side you can stretch that out to about 3x7' and regularly hit 1.2-1.5 gpw.
 
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