Heat signature in shed

[Newgrow31]

So if I was to run a 600w hps in my shed how can I control heat to stope the helicopters picking it up

 

[St. Tom]

So if I was to run a 600w hps in my shed how can I control heat to stope the helicopters picking it up

you cant really people grow in there lofts and seem to be ok also my friend grows in his shed with no problems