If i could give this fixture less than 1 star i would. Purchased it several months ago and from the start it has often refused to turn on. Arrived home today to discover a dark aquarium. Its not working for good now. Never been damaged, although after inspecting the fixture some of the screws are rusted, none are matching, as if it was reassembled. Contacted aquaforest aquarium and really hope they will replace it. Ridiculous.