3 x 315 W or 2 x 630 W of CMH
- Thread starter mucki
- Start date
I'd run the 630 in a big parabolic vertical hood like this one:
https://www.amazon.com/gp/product/B00QR3SA1K/ref=s9_acsd_hps_bw_c_x_12
Two of those will cover your 4 x 8 nicely. Big vertical parabolics are very under-rated.
If you were gonna run the single 315s your best setup would probably be picking up another 315 and running them staggered like this:
oxox
xoxo
x= light
o= empty space
The problem with the 315 is it really only covers 3 x 3.
https://www.amazon.com/gp/product/B00QR3SA1K/ref=s9_acsd_hps_bw_c_x_12
Two of those will cover your 4 x 8 nicely. Big vertical parabolics are very under-rated.
If you were gonna run the single 315s your best setup would probably be picking up another 315 and running them staggered like this:
oxox
xoxo
x= light
o= empty space
The problem with the 315 is it really only covers 3 x 3.
IMO only run the dual fixture if you outfit the dual lamps into your own reflector of choice. Something like a dual bulb raptor. You can get a mogul to CMH conversion for the reflector pretty cheap. The dual lamp ready to go reflectors currently selling are kinda small and you'll probably get a bad hot spot and uneven coverage. You need a big hood to get good coverage. I mentioned the vert parabolic earlier check out vapedg13 parabolic grow using that hood getting 2 lbs per light off cheap metal halide:
https://www.icmag.com/modules/News/showarticle.php?threadid=243060&page=3
Also this guy ran vert parabolic over 5 x 5s in sog and averaged 3 per light:
https://www.*********.com/community/threads/soil-sog-grower-needs-mentor-to-switch-to-hydro.25499/
https://www.icmag.com/modules/News/showarticle.php?threadid=243060&page=3
Also this guy ran vert parabolic over 5 x 5s in sog and averaged 3 per light:
https://www.*********.com/community/threads/soil-sog-grower-needs-mentor-to-switch-to-hydro.25499/
GoldenSyrup
Active member
Go with 4 x 315w fixtures for the entire space - the DE lamps offer less PPF over all than the SE 315w fixtures do. Plus you'd have more points of light which means better canopy penetration.
