This with HPS and Led ; What I think and do about it : I use Both but for seed and clones I use cfl and some smaller led spots. Maybe I buy a led for clones and seeds because they love led in veg. Flower I get more " fruit " in my flowers with HPS side by side with Led if it gets to hot I dim hps 600-400 ( I don't change 600 to 400 during day ; I don't want do destroy the lamp by changing settings to often ) or put in a smaller ( 250 ) and/or two cfl's and ledspots ( 5w-20w ) wich I can put down beside them, so there are some choises. That's how I manage heat problem. the building doesn't have good ventilation and put out vent so neighbours can see it's not an option! . Yes It's hot during summer 26-29 deegrees / sunny day. I push them so very important to lower temp during night and one or two day a week only led , it is the only wich can cover the area good and lowest temp and still growing slow though.
Yes the led Spider cob 432w actual 265w I think, some say that and some that....anyway it works fine. Move them aroud it's good so they get differnt light different angels. Some spots more intense light , then I can put they who can stand it in bright light etc..
