flowering under a 600 watt HPS bulb with ballast dimmed down to 400 watts

Mcoocoo

Mcoocoo

Well-Known Member
auswolf said:
Don't dim a 600w bulb, you will loose a shit load of lumens. Always use a 400w bulb on a 400w setting.
Don't listen to a sales rep........

Here's a pic showing my light height.(2x600w 400v hps)
View attachment 4404359
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Is it safe to to use a 400w in a 600w ballast set to 400? because that is what I want to do, thanks. Is this photo at the 400 setting?
 
Mcoocoo

Mcoocoo

Well-Known Member
I'm gonna give them bone meal flush, to tie up any salts and then drop my feedings down a bit
 
coreywebster

coreywebster

Well-Known Member
Lord Bonkey said:
3x3 the max area a 600 will cover
its not your lights
well not lux anyway, it might be heat, so again, how high is your light?
whats your canopy temp
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Since when is 3x3 the max area a 600w hps will cover?
How do you know how well his genetics can handle high intensity light levels?
How is he going to read his canopy temps?
And how do you know a 4" fan can handle a 600w in a 3x3 without knowing his ambient air temp?

I appreciate your trying to help the guy but sounds like your equating what has worked for you as what will work for everyone.
 
L

Lord Bonkey

Well-Known Member
coreywebster said:
Since when is 3x3 the max area a 600w hps will cover?
How do you know how well his genetics can handle high intensity light levels?
How is he going to read his canopy temps?
And how do you know a 4" fan can handle a 600w in a 3x3 without knowing his ambient air temp?

I appreciate your trying to help the guy but sounds like your equating what has worked for you as what will work for everyone.
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lol are you the one who told him his lumens are too high?
 
Mcoocoo

Mcoocoo

Well-Known Member
Mcoocoo said:
I'm gonna give them bone meal flush, to tie up any salts and then drop my feedings down a bit
Click to expand...
I will say this, if it is nutrient burn, it is most likely due to the high light intensity causing excess transpiration, and in return causing the roots to pull nutrients up quicker than usual, not to mention the fact that this plant was lollipopped, the bottom third of the plant was pruned off, and all of the nutrients are shooting straight to the top of the plant and there is less leaves overall to act as a buffer.
 
coreywebster

coreywebster

Well-Known Member
Lord Bonkey said:
lol are you the one who told him his lumens are too high?
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No.
Im not saying you cant run a 600w in a 3x3, plenty do. I'm saying your making blanket statements which are wrong.
Such as "600w max coverage is 3x3", they've been used in 4x4s with great success since they came out.
"You can run a 4" canfan which will take care of the heat". It's about desired rise above ambient, how much cfm is related to how many degrees you can afford to or want to raise from ambient, since we all live in different climates all our needs are different.

Anyhow I was obviously been a bit cranky to even bring it up.
 
L

Lord Bonkey

Well-Known Member
Mcoocoo said:
I'm guessing he meant that a 3x3 is the minimum that light is suitable for.
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no, the maximum, anyone who say different like the other fellow should maybe learn to calculate pars before giving people retarded advice
3x3 with a 600 will give you 96 par which is the min you want
 
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