Gavita 1000 Watt double ended 400 Volt output in Sannie's Corner Posted July 29, 2011 · Report reply if you grow in scrog then the height of your growroom is no limitation and you do not necessary have to use a mover. The reflector has a wide spread, use reflective walls and keep it at 2,5 ft from your crop. The exit radius of the reflector is 120 degrees so figure it out Remember you can have about 50-70% more light with the 1000W double ended compared to 2 400W lamps, depending on brand and ballast. Cheers Whazzup for your input, appreciated. Well the hieght of the Growroom is a limitation to me, but only due to the style I prefer to grow. I also have strains which don't really like a scrog and much prefer a tree like status (all be it with a load of training..very handy with the old string and yoyo's) to reap the benefits. Only a few are like this so scrog was always ...and is always on the cards. The Light rail was an idea Primarily to lower the light burn risk, as a distance of 2.5 ft away from the light REALLY DOES give me hieght limitations (for me anyway-strain dependant). I thought moving the light would enable me to get the light closer (plants to grow taller) without burn. I was hoping to get the light to aleast 12-16" away from the canopy. Your thoughts on this would be welcomed Whazzup. The choice of the Gavita 1000DE or the Pro 600 was apart from stability, reliability and bulb is down to the Reflector. very impressed with it preformance from other grows I have seen...and low cost for replacement. (£20) Whazzup... been reading through a few of the lighting reviews/testings you guys have done here..... great stuff.