Mars300, especially the NEW ones, are not that bad for their price point. They make excellent veg lights and work fairly well in small spaces. Paired with some supplemental CFLs and they'll compete with any other low budget grow.
When you see many people on RIU complain of mars, they're mostly referring to the old models, and they attempt to use them in much larger grow rooms and wonder why their yields suck.
View attachment 3590460
Week 6 of flower under a mars300 w/ CFL supplemental.
She's over 4 feet tall and already know she's over 4 ounces in weight.
Top Cola, about the size of 12oz soda can, very dense
View attachment 3590465
Resin
View attachment 3590466
Mars work just fine when you're not trying to flower huge areas or multiple plants.