maybe this will help lol? Simple "Stealthy" Closet Exhaust Solution

No, that's a misconception. Since HPS lights are more efficient, they put out more light and less heat than the equivalent wattage of CFL. The only difference is the type of heat they put out. CFLs are mainly convected heat, whereas HPS puts out radiant heat.

This simply means that HPS have a "hot spot" immediately around the bulb, so you can't place plants too close to them. This is not that big of a deal, I can get plants within 6 inches of my 250 with no problems.

Overall, 250 watts of HPS will put out less heat than 250 watts of CFL.

1 x DR80 Dark Room Grow Tent
1 x 250 watt Lighting System
1 x 250 watt Metal Halide Bulb
1 x 250 watt Son T Plus Bulb
2 x Easy Roll Light Hangers
1 x 2 Way Contactor
1 x Grasslin Analogue Timer
1 x RVK100 Extraction Fan
1 x 100mm Carbon Filter
5 x metres 100mm Ducting
3 x 100mm Ducting Clips
1 x BioBizz Grow 1 litre
1 x BioBizz Bloom 1 litre
1 x 50 litres BioBizz All-Mix Soil
1 x Square Tray
4 x 11 litres Square Pots sorted small and only £255 if you live in uk lol i use 3ch.co.uk cheapiest i have found

the cupboard aint i good idea