The lamp and mounting cup worked very well and provided bright light at a distance of about 4 feet. I used it in combination with a Fresh & Plant 2.0 Full Spectrum LED Panel. It's quite a sight to see my air stone's bubbles floating through the light. After that has been said. After 6 months I have to ask for the guarantee. With light/normal use, the case has leaked water onto the LED and circuit board, which could result in a dangerous situation. I now have to send it in for warranty inspection/repair which is an inconvenience I did not expect from such a reputable brand (Tetra recently replaced my AP300 due to an early failure, I only requested photos and a valid receipt). So this process is not as easy as theirs. Also, I believe the warranty should cover shipping costs due to manufacturer error (poor IP68 sealing). it's not like this. I'm praying for my last one (bought 1 night before this one failed) it doesn't fail underwater either.
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