Check this 20*20mm waterproof led silicone tube with black finished for 12mm led strip lights. The different internal structures of neon led silicone tubes focus on different ways of using neon led strips. This neon silicone tube diffuses the upward LED light from the bottom LED light strip and bents along the back of the strip. Good bending performance. 
Made of food-grade silicone material, the silicone led strip diffuser has excellent weather resistance, no discoloration, no cracking, and good light transmittance, no LED glare. 
Flexible led silicone tube is usually paired with flexible LED strip lights to make flex LED neon lights. IP67 waterproof protection for inside led strip light, perfect for outdoor decoration, such as outdoor Christmas lights, outdoor bar lights, outdoor wall lights, outdoor house lights, outdoor wedding, outdoor advertising, outdoor swimming pool, etc.