So our first crop is done,here is my honest take .
Easy to manage the overheat as unit runs way cooler than HPS.
Seemed too only increase room temp by 3c at full power 680w, HPS added 6c at power 500w. YIELD Same as our 750W HPS
BUT that is with a new bulb in the HPS, so if this LED unit lasts 5 years it pays for it self,HPS bulbs need changing at least every year at $150 per bulb.
Unit is large and heavy not as easy to move around,not sure if you switch lamp in different rooms will be a h...