Quote Originally Posted by morning glory
Hi all,

just wondering does a 250w lamp run at 0.25kwh? so 4 hours being a killowatt....12hours = 3 killowatts?????and if it cost say 10 pence a kwh does this then equal 30 pence a day running cost (12/12) also i want to set up a stelth grow (who doesnt) but worried about the police helocopters with thermal image, is a 250w setup anything worth worrying about? is it best to stick to envirolites cfl (low heat) i mean i live in u.k do the pigs even scan attics in this country? i dunno...
Your calculations are spot on, except when you get to your terminology. A 1000W load running for 1 hour = 1 kilowatt-hour (kWh). Your 250W light is indeed .25 of 1kW and does take 4 hours to consume 1kWh.

Forward-Looking Infrared (FLIR) thermal imaging isn't magic nor is it an X-ray. FLIR can not see through walls. FLIR can only measure the temperature of a surface it is 'looking' at. If your lighting is permitted to warm an uninsulated exterior wall or roof, it would show up as a warm spot on FLIR but FLIR isn't going to see an outline of your grow op through the wall. I wouldn't worry about thermal signatures until you're running more than 3-4kW. You can totally mask your op's thermal signature just by insulating the walls that surround the grow and by cooling your exhaust air by mixing it with some cooler air once it has left the op airmass or distributing the exhaust to several points to reduce the heat concentration from the exhaust.
Al B. Fuct Reviewed by Al B. Fuct on . NEWBIE QUESTIONS? Hi all, just wondering does a 250w lamp run at 0.25kwh? so 4 hours being a killowatt....12hours = 3 killowatts?????and if it cost say 10 pence a kwh does this then equal 30 pence a day running cost (12/12) also i want to set up a stelth grow (who doesnt) but worried about the police helocopters with thermal image, is a 250w setup anything worth worrying about? is it best to stick to envirolites cfl (low heat) i mean i live in u.k do the pigs even scan attics in this country? i dunno... Rating: 5