Close. It depends on efficiency values.
I do not have the HLG but 600watts is 600 watts . I assume you ran a 6" 400 cfm with the 600watt hps. The same setup will cool your tent the same with the led . The ambient air temp outside the tent is key along with the negative pressure created by pulling out warm air faster then it can be replaced with cooler, dryer air.
I see where you're going with that. Keep in mind that the emitted light bounces all around and heats up whatever it hits. If the system is pulling 600watts from the wall, then all 600 watts end up as heat....except for some biochemical process in the plant that might capture some heat.
Do you know if it comes with a cable long enough to mount the driver outside the tent? I have an SF-2000 I want to do that to but I'll void the warranty. I wouldn't want to void the 3 year warranty on the HLG.
My 4x4 tent is in the garage and I have to run a portable AC 24/7 during the summers here in AZ to grow and my lights on temps are 78-82F. I run the HPS in a cool tube so like you said I'm able to cool the bulb down, this makes me wonder if the LED is going to be harder to cool in my setup if it creates the same amount of heat. I'm currently at the point of trying to pipe the portable AC directly into the tent or just go back to not flowering in the summer.
Yea I'm running a 6" AC Infinity, its the ambient temps that are killing me. I don't have anywhere else to put this tent but the garage.. It doesn't seem like this light is going to help with my temps any like I had hoped. Summers might just have to be for vegging.
Thanks, I'm going to look into those. I don't know why companies aren't making that a standard feature. My SF-2000 driver dimmed at 60% is 130F
Correct, led doesen't raise leaf temp above air temp with IR, hps does.
I ended up buying one and have it running in a 5x5 right now, temps aren't bad at all. Also checked with HLG and they said I won't void my warranty if I rewire it to move the driver outside the tent.
Were you able to get it in writing?
That would explain why I've seen leaf temp readings greater than the ambient temperature.
Looking at spectral charts, I think HPS emits much more IR than any LED grow light fixture I've seen. I would not expect leaf surface to be hotter than the surrounding air. I don't see that in my grows.
when the weather was cold the leaf temp under a tsl was greater than the ambient, I've not had leds that long but ime it's not a given the leafs are 2c cooler.
