Well I must say them are some giant colas. Got any closeups?
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c

Thats a 1000watt HPS bulb kicking out 180,000 lumens? That is more effecient then any bulb I have ever heard of. The most effecient is the low pressure sodium at 200 lumens per watt. Flouros are around 180 lumens per watt but high watt flouro such as the 600 watt bulbs produce RF waves. ( I used them when I made fiber optic cable). You using three 600 watters? A 430 son agro I thought was the most effiecent at 53,000 lumens which is 123 lumens per watt.

One love
c