what spectrum MH lamp ?

[charlesweedmore]

what spectrum MH lamps must be used for vegging ?
there are too many MH lamps in market.
eg,sunmaster warm deluxe neutral=4000k,cool deluxe = 7200K
Sunmaster HPS MH Conversion = 6000K

i am confused.which one is true ?
In addition, can all 600w MH lamps be used with all 600w hps ballast ?
and can i use 600w MH lamp in 125mmX490mm cooltube ?
(MH lamps are bellier than HPS lamps )

thanks

 

[Haps]

Any MH will do, I use the cheapest, and change them at six months. Not many 600 mh's around. Have fun.
H

 

[charlesweedmore]

thanks

 

[sparkjumper]

I agree with Haps you can veg plants fine with any MH.People that spend hundreds on lamps like agrosun gold are wasting their money.I definately believe in hortilux for flower though.I wont flower with an underground garage HPS lol

 

[CannaDestroyer]

charles for veg look for a bulb in the 4000-6000k range, closer to 3000k for flower. all 600w mh lamps currently out are just conversion bulbs for use with hps ballasts. mdhydro sells a knock off brand 600 for around 45 bucks shipped. i've had one for a few months now and it seems to work quite well in the veg room. this bulb is 4200k by the way. also not sure if it applies to you, but they work in digital ballasts.