interesting Suphew, thanks for that.
yeah the replacement value of a 4' 6500k lamp is $8-10 each for standard fluros, about $12-14 for VHO fluros and the MH i think about $30-35 each so four 4' fluros will equal 144watts for standard or 232watts and about for VHO costing between $32-56 each relacement when you look at two 150watt MH total of 300watts at $60-70 for replaement, then i'd replace the fluros about eery 6-9 months and the MH every 9-12 months so over all not that much difference, i supose in saying that we'd better go the MH way a especially since we have 2 5500k lamps never used sitting here(free with ballasts i've brought in the past).
Cheers Bri for clearing it all up
Rob & Michelle