These have less than 3 months use at less than 20%. I put them on my 300 gal temporally and decided to go a different direction on my 600 Gallon. $750ea or $1,400 for both shipped USPS. One of the Lights had a cracked case from the factory. Ecotech sent out a new replacement faceplate which I put on. I will add the cracked one as well since it has the serial # on it. Both lights work great.