With a 400watt hps 300 watts produce the heat needed for illumination.
Its a 300 watt heater and a 100 watt light basically. How do they flower under the flouro tubes?
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karmaxul Reviewed by karmaxul on . HPS 400 sufficient ? ... heat ? I have grown exclusively with Flourescents for many years, 320 watts of 4-footers, because I just never wanted to deal with the heat put out by the sodium lamps ... but, I am thinking of experimenting with a 400-watt sodium at the next flower time ... my cabinet is 2ft x 4ft x 6.5ft ... would a 400w be sufficient , or just barely ? ... also, how much heat will the 400 produce ??, finally, how high above the plants would the 400-watt HPS need to hang ?? ... thanks in advance for answers :smokin: Rating: 5