As someone who has tried several of these the C2 is absolutely the best. I don't even know where to start: it has an app to control the timer and change the shades. Say you want a pink tint, you might have a greenish tint, you get the point. This flashlight is versatile enough to fit in a 2 gallon or 30 gallon tank depending on how bright you set the application. I don't know how you can choose anything else in this price range. The next alternative is the ONF Nano, which is more expensive, less bright, no color customization, no timer, and much less durable. C2 looks like a polite tank that lights up life in all its glory. If you can't tell yet, I really like this light and I hope you have a chance to get one of these so you can enjoy it too.
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