NagaMad said:
Does anyone know whats the deal with digital ballast?
In the UK, Growell; one of the best know hydro stores, has dropped DB from their website and brochure because of problems with starting and radio interference (i think).
Any one else know any problems with DBs?
Also hadman, what is the size of room that your using the 400w system in?
Digital ballast are more efficient then the old magnetic ballast.
They have a "smart chip" that detects and maintain a constant output.
They also have soft start which increases the lamp life.(The soft start is the problem with starting some lamps with some DB).
They can run both Metal Halide and HPS.
They run super quiet and relatively cool without a fan.
But .....
They cost a lot more.
They operate on a much higher frequency (some people have reported interference with some home items).
I've run it for more then a week now, it's in my grow room/home office and I have not noticed any interference whatsoever and my computer is about 4 feet away from the ballast.
Some ballast more then others (lumatek) have problems starting some HID lights and have high failure rate.
The high failure rate may not be a problem anymore.It's new technologie so the first ones are not perfect.
My grow space is ridiculous! 18" by 36" surrounded by mylar.
I have doubled my growing space to 18 X 80" but I need to modify my HID reflector so I can use the light for 18" x 80".
I'm running it with a 20$ GE Lucalox HPS lamp (It's not sold for growing plants, it's a street light HPS!).
I got the ballast from bghydro
http://www.bghydro.com/BGH/Itemdesc.asp?ic=HLBADIGA04&eq=&Tp=