I have the same units and they are great I paid $300 for 2 units 3 months ago and corals are growing great and I have no issues with water heating as you do with other lighting and my units are mounted in a wood top on my aquarium. The seller has 100 percent feedback score and has sold approx. 1100 led
lighting products in the last year with 1 neutral rating and it has a 1 year warranty. Great buy in my opinion.