http://www.lighting.philips.com/main/prof/conventional-lamps-and-tubes/high-intensity-discharge-lamps/ceramic-metal-halide/mastercolor-cdm-t-elite-med-wattage
my setup uses the mogul based 315 in 4200K.it has the e39 base instead of that pgzx18 like most 315s
I ran my first SS 315 at 210....well the switch never got flipped at the manufacturer...
The bulbs rated open?
haven't thought of doing it that way! would save money on not buying a new bulb.
the 210 i saw on ebay was enclosed rating. which is fine as i run my 315 in a reflector with glass anyways.
This^^^. I wish my basement had another 2 feet. At least a foot. Iam at 7 now with 8 750 Gavitas. And the fixtures are between the basement floor joists. Got lucky and they happen to fit just snug. Nanos with the flat horizontal orientated ballast would of been even better but they would of been even more recessed...shining on about an inch of joist wood...lol. (Sawzall on a rental home = been there done that. Many landlords are pissed in this town). Truth is..I actually am too low for double ended hps. My plant heights are critical. No room for error. And canopy management is critical/ veg size is of the utmost importance. Yes...with de's...its easy to fry the tops. I have to train them low and wide in my veg room. Much more important than mogul socket hid's. 8 foot plus minimum for even 750's and I'd venture to say 2 or 3 ft more with thouie de's. But if I keep them low and out of the danger zone...Iam ok. Cant run drain to waste tables either. Just plumbed together catch saucers for runoff. Lowest I can go. Every inch is prime real estate. Again..ive said it before..and ive heard of it but I dont understand how people are cramming 750 and 1000 watt de's into tents and low ceilings.
I considered doing the very same thing. I was going to get 1000 de hps and put hem up inside the ceiling joists but then decided on the cmh lights but of course had to over think it and want to add hps, as I have grown with hps for like 10 years so I naturally want to use it.
1000 watt de's arw no go for anything less than 9 foot. At least I would think so. Iam had trouble with 750's at 7 feet. Sucks for us low ceiling growers to not be able to take advantage of powerful efficient de lamps. I manage but I have to pay attention more to plant size. One of the reasons I am so on the fence with cmh lamps. Would be perfect. But i have to know for sure the weight would still be there. Its a hefty trigger pull/gamble buying equivalent wattage of fixtures of an untried (for me) new lamp at what...450 $ a pop? Thats alot of bread...even for a dope grower. Todays dope grower anyways. 15 years ago...sign me up no problem. Lol. Heres the cash. Lol.
i almost went the DE 750 route. i'm glad i didn't even with 8 ft ceilings.
Overlapping light increasing intensity. But not that high indoor. 5-6 ft at the most. (6ft would be in veg or very early flower) and that's in 500-1000 light rooms.
Watt meter..& a member on here pointing it out.
