My ballast is a Lumatek digital ballast, and it's been working great. I've seen those lights you linked there. The price is definitely right. But they look like they might be tough to cool. Get one and let us know how it works out.

Oh, as regards the RF signal, I think most or all of them use shielded cables now. They started shielding the cables, not because the police could detect them, but because they were interfering with cable and satellite. I doubt any of them have that problem anymore.

The Grolux lamp that comes with that light says it has added blue spectrum light, and they refer to it is 'dual spectrum'. I've never tried one of those, but maybe that and a few CFLs would work okay for veg, then use that same lamp to flower too.

Pretty good prices at that place! I bookmarked it.