I guess it largely depends on the space he's working with and what sort of ambient temps his area is keeping.
For a small space like 60cm x 60cm x 180cm - a large HPS will be too much. And a lot of wasted heat energy and getting rid of the heat.
I even struggled with an Un-cooltubed 250w HPS as the temps regularly hit the 90s. I don't live in a particularly warm place.
I've had most success with a 250w (ish) LED panel. Keeps a great temp in the cab and produces the same results per plant as a friend rocking 2 600w HPS's in a huge tent. (very different setups in the same sort of ambient temperature climate)
I think size IS important in this respect!
(i know .... "thats what she said!" lol)
For a small space like 60cm x 60cm x 180cm - a large HPS will be too much. And a lot of wasted heat energy and getting rid of the heat.
I even struggled with an Un-cooltubed 250w HPS as the temps regularly hit the 90s. I don't live in a particularly warm place.
I've had most success with a 250w (ish) LED panel. Keeps a great temp in the cab and produces the same results per plant as a friend rocking 2 600w HPS's in a huge tent. (very different setups in the same sort of ambient temperature climate)
I think size IS important in this respect!
(i know .... "thats what she said!" lol)