That is a good point. I wonder though at what scale is it too small to be worth it in yield vs $ invested? Too lazy right now to want to think about it in numbers lol.actually most grow books say a few lights is better than 1 light,think of it like your like is putting out a triangle of light, 1 light would cover alot less area than 2 lights half the wattage,plus the 2 lights would distribute it more evenly, thing of it like this one light covers like this - / \ 2 smaller lights /\/\, more area covered you see?
"Better" in what way?
The 400 will be more cost-effective, in terms of lamp cost, bulb cost, energy cost and yield/watt energy used.
If actually used to their maximum, the 2 x 250s might give a better absolute yield. Plus having two lights gives you a lot more flexibility in terms of placement, spectrum, etc.
Note that when the plants are small and vegging you well might get away with running ONLY one 250W hps, and doing that will probably save you more in terms of energy than the increased efficiency of the 400 would!
agreed! plus, if the light fails, you still have a 250w running providing light, if the 450w fails your fucked. im a big advocate of more, smaller lamps."Better" in what way?
The 400 will be more cost-effective, in terms of lamp cost, bulb cost, energy cost and yield/watt energy used.
If actually used to their maximum, the 2 x 250s might give a better absolute yield. Plus having two lights gives you a lot more flexibility in terms of placement, spectrum, etc.
Note that when the plants are small and vegging you well might get away with running ONLY one 250W hps, and doing that will probably save you more in terms of energy than the increased efficiency of the 400 would!
I think 2 spaced 250s would give you better penetration than a single-source 430.430w hps I would think mybe a little better penetration to the lower buds?
....Yep roll with that...if you get 400 watt lumitec balasts they take iether type bulb...and also take 250 watt bulbs....great versatility...jmhoactually most grow books say a few lights is better than 1 light,think of it like your like is putting out a triangle of light, 1 light would cover alot less area than 2 lights half the wattage,plus the 2 lights would distribute it more evenly, thing of it like this one light covers like this - / \ 2 smaller lights /\/\, more area covered you see?
So you saying a 250w will give better penetration at the lower buds then a 400w?I would think 2, 250w would give better spreed of light though, but not at the lower buds?jmoI think 2 spaced 250s would give you better penetration than a single-source 430.
I do agree that a 4x4 is aching for six hundred watts. cn