I had a previous iteration (non-pro from 2012) of this flashlight in the 24" version and loved it so I decided to try the 48-60 inch version on my new 45 gallon (48 inch long). Day 2 after planting, and Monte Carlo/Anubias nana petite starts to pearl and blisters appear on all plants, making them look healthy (even after arriving in the post, slightly yellowed and sad looking). I can already see new growth springing up. I had to change this light with another product I received from Amazon (currently called 4PCS Stainless Steel). Aquarium Fish Tank Stand High LED Light Lamp Aquarium Bracket Holder, but I bought another version on Amazon a long time ago. I had to pull the existing black rails out of the power light (yes they come out) and then bend the silver rails from the plastic bracket mentioned above to be wide enough to slide into the power light (see photo), this allows for that light can be raised about 3-6 inches above the water which gave me some wiggle room. It's also easier to do water changes/raise your hand in the tank and also I think it just looks classier than sitting flush with the top of the tank. You can set the color of the day and night lights by selecting from 0 to 100 for each LED color (red, blue, green, white) and when the timer reaches the start time you'll get a smooth 15 minute transition from completely out to daylight Color the light you created. When the timer sounds, it switches back from daylight to your chosen night light color within 15 minutes. The night light color (which you CAN set to 0-0-0-0, or all LEDs off if you prefer) stays on for about 4 hours and then turns off completely. I hope this helps others, I couldn't find a CLEARLY explained description from previous reviews I read. Twinstar or best light at this point.
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