digital greenhouse ballast

someone please tell me the truth about htgsupply's digital greenhouse ballasts

are they good?

reliable?

won't burn down my house?

do they get hot?

I'm torn between what to buy (wanting to get a 600w)

and I've done tons of research, I just need someone to steer me in the right direction

thanks

Johnny

bump ... anyone know what kind of fan would be suitable for a 600w HPS?

can a 250 cfm work?

I use a DG ballast, it runs very cool and silent. It's been through 2 grows and works well. I have the 600.

I use a 450cfm fan to cool the light and exhaust my tent.