"No matter the light source drawing"... Is this correct? As in 1000 Watts of HPS puts out same heat, as a 1000W MH as a 1000W CMH, as 1000W of fluro, as 1000 Watt LED ?If so explain, I thought each type of bulb had different efficiencies so different amount of energy went to lumen output while different amount as heat. As well as bulbs age, they put out less lumens, so the lumen/ratio gets worse.
Plese enlighten if you know more than me, its quite probable
Within a tent with reflective walls the heat is there almost the same between all light sources. The byproduct is heat. You go back to the original heat per watt. I do not have the value but it so many btu's per watt.
If done in the open out of a tent you may be able to dissipate it better.
And an air cooled hood wicks the heat away making the CMH with a air cooled hood really nice for max lumens per watt within a heat range.
I have run 315 CMH
VERO
STRIPS
QB BOARDS
But never old school
All that being said about 400 watts of light in a 4 x 4 is dissipated with a 4 inch scrubber at full power to maintain an ambient heat under 80 with lights on. With an ambient 68 degrees main floor and 65 in the basement where the tent resides.
Based on a timber and a grow strip light and a quantum board.
And plants grow better under 80 with no co2.
And any gain claimed with heat production being better per wattage needs to be really observed. The difference is probably less than 10% from HPS to Veros but veros do produce more lumens per watt.
That is where the efficiency lies. You can produce with 600 watts what you could with 1000
watts etc. And for personal use I am doubling my usage in a 4 x 4. I will break it down smaller but i think the goal for a hobbyist is the best dank in the least space and energy requirement.
Green Green.