Hello B I'm affraid where lights are conerned I'm only know the one I use and to be honest I no next to nothing about that

Before I bought it I read and was told that the best combination of lights was a Matal Halide for vegitive growth and an High Pressure Sodium for flowering.
Well I just went to the growshop told them what I wanted and they sold me the set up.
The ballast thingy can take both sets of bulbs, so when I've finished on the vegitive growth I just unscrew the MH bulb and screw in the HPS bulb and start 12/12.

I know the guys on here are always on about different types of lamps so I bet they can help you.

Heres a pic of my ballast thingy, oh, the small box that is with it is a relay switch, which stops the timer from melting.

The set up runs on 400 watts and they are quite exspensive to buy but I think they can be found cheaper if you shop around a little



love mand xxx
mand Reviewed by mand on . Just a little journal............ I hope no one minds me doing a little grow journal right from the begining this time :) Well I've geminated sixteen sensi skunk #1 seeds, all have germinated and they have been potted and are now showing. In total this took four days. I've put them in the growroom under a MH bulb that is running on a eigthteen and a half / five and half cycle. Ok now it's the boring bit..........waiting :rolleyes: My whole grow will consist of, germinating, potting, re -pottting to bigger pots, Rating: 5