MurshDawg
Active Member
two 150 watt HPS don't put off nearly as much heat as 1 400 watt. not to mention lumens are measured from a distance of 1 ft away from the source of the light. These t5 guys are used to hanging their lights 3-6 inches above canopy, so they are getting way more light than what the lamp puts out in lumens. Remember inverse square law Also if you are running V-HO bulbs on an HO ballast you'll get higher luminosity then through the HO bulbsWouldn't the T5s effectivness be hindered greatly by the distance needed for the HPS though? seems like a waste to me imo