I would just stay away from any of their fixtures that don't use common MH bulbs. I know of people that have their 175W fixture and it used DE 175's. No one makes them so limited choice on bulbs. If I recall some people were sticking 150W bulbs in these fixtures with success.
The older fixtures did have some reports of fires so I would make sure it is new or fairly new.
I would personally go with a more popular brand that there are bulb performance results for as far as PAR levels. Helps if you ever want to change bulbs.
http://www.reeflightinginfo.arvixe.com/