If hps heats up the air in grow tents by much then the sun would heat the air on the surface of our planet past habitable temperatures and we wouldn't be here cause we would all be dead.
I've had this long running argument with led folk where they think hps heats your tent far too much and leds don't. I've tried to explain the science and physical principles of heat and light which be 'Conduction, Convection and Radiation' and that air is not heated by very much whatsoever from a few hundred watts of hps in a well extracted area.
Weve had to explain how to grow just so that some can realize its not leds they need but to cool their house and environment as at certain air temps everything will struggle to grow and adding light will further compound the problem whether led or not.
A long 20 page running thread and not one answer to these and other questions but im supposedly meant to state the science for these guys out of some ill born lazy ass nature they have where they simply cant or wont google how light heats air and by how much, possibly even just the basics on how the sun heats our atmosphere.
And so it carries on, prove it, show plants or your not a grower, bet you dont even grow.... well ive proved many times that i grow just firn, recent pics have shown healthy plants under hps in the middle of a heat wave here in the UK, air temps before lights on last night were 27c in my tent.
This site use to have some with brains, now it just attracts your general dross and pretty much your opinions are lame and self centred, no wonder you need me to post pics but shut up as soon as you view those pics, small grower for some years now