hi ive been running 2*mars2 900 for the past 3yrs, over the last yr Ive been losing leds and just recently I lost a third of the panel in one go. The lights have been supplemented with a hps 400 set on a thermostat. prior to using the hps i found my buds lacked volume. The hps seemed to rectify this, I only ran it for 8hrs a day. Ive been happy with my results grow wise, I usually yeild around 1.5pounds off 2 plants grown in area of 6*4 feet and the smoke is awsome. So do I go out and just buy 2 new mars2 900s or is there better bang for buck around? any opinions would be appreciated. shnapper