Well said. I'll look into that then. Big savings at 3 lights.
At this point I'm thinking one light deep side by side. Much like Carolina's is. If I have a half foot more narrow canopy that's fine, the light will be used better that way.
Already have one growers choice de 630 @3kr. I like it, but it's a big hot spot then dumps off quick. I think im going to get 3 more of the 315s we talked about, with my 630. My area is 9'10" wall to wall and I have panda film out 4 feet with equipment and what not on the other 5 feet of the room.
In my experience a single 315 can flower 2.5' x 2.5' as well as as possible but plants outside that area tend to lean in and crowd each other.
When I run multiple 315's I will use 3x3 squares for placement.
No need for two in a 4x4 more like 4x6 would be effective.
Save some more money man.
Personally I think a 600 hps and a 315 cmh over a 4x6 area would be perfect. The 315's made nice compact colorful plants but not as dense or as high quality as combined with hps.
Just like the connisour growers have always used 2 to 1 hps to mh.
1.5 grams per watt from a 315 is still a lot less than 1 per watt from a 600. My 315 next to the hps yielded 30% less. Just like the math says.
Again. Just my experience. I tested all year from last November to about July when my room got too hot for 3 lamps.
Plenty of pics and info from my trials in this thread back then.
Also. I have gone back to hps only. (Hortilux super) and the potency has actually gone up from the stuff I thought was frostier and better under the 315.
It looked better but less watts is less no matter what invested buyers say.
I will use a combination of lamps with more hps for flowering In future builds.
I know a few pros growing real big. They use de 1000 and a 315 Phillips per table.
THe university of Michigan has shown that too much blue light while great for leafy greens is not right for flowering annuals. They suggest red with a little blue. Keeps plants green and healthy but has better flower response.
The spectrum on the 315 3100k is mostly right but could use more red peak to offset the balanced spectrum in my testing too.