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I replaced the original double tape for the best results, and works well, but your idea to use silicone can be more safely, because some water can damage the strip. You can use waterproof led strip too.
Hi Mohammade in theory, yes, but I have not found any reference using LEDs, so ... This lighting is only aesthetic, I think for your plants continue to grow, you'll need a fluorecents lamps with specific length of light waves.