It was my first grow and I had problems throughout. so its probably not fair of me to blame the Mars for the airy buds. No doubt others will get far better results than me. Still, I'm going to convert the mars to cobs as per groumouse's guide on youtube.
What cobs are you getting?
I just finished a full cycle with a mars II 900 ( 385 w meausered at wall), see my comments above. They're decent value in relation to similar fixtures, but nobody should be recommending them over pre-built diy-style COB fixtures. They're similar cost but are some of the best lights available anywhere compared to the Mars which will be easily out performed by a HPS of similar draw.
Yeah, they work fine for sure.
I got Vero 29 Gen 7 300k 80 CRI.
However I am using my own Meanwell drivers, instead of the included ones that are at .7ma.
I will be finished later tonight. Running 6 COBS at 2.1A in 1 3 x 3 which give me over 950 PPFD without reflectors.
I bought reflectors, but I will not be using them.
Ill through up a post today on the finished product
Reason for going with Vero 29 over CXB was the fact that they are twice the price in Canada and a small amount of wattage increase is fine with me as electricity isnt a concern at all.
From my comparisons your savings are negligible unless running very large setups in a commercial environment.
If you want some help PM