Well after much research the best buld....Hortilux is up there.....although while HPS has had the best for a while....now the MH Hortilux Blue is supposed to reproduce the most acurate replication of the sun....so one bulb start to finish...but not as much stretching as with a HPS hortilux. SO gonna try and grab one of ebay as cost in stores for MH BLue Hortilux 1000 is 299 plus tax!