I tried out some heatshrink tubing that I received from www.heatshrink.com. It was their product A2(3X). This product shrinks by triple. It was 18mm clear. It worked pretty nicely except it was kind of tough to center the hole of the heatshrink perfectly around the LED. <br><br>Then, I went to Home Depot and picked some vinyl tubing with an outside diameter (OD) of 1/4" and an inside diameter (ID) of .170". I cut a small section and pushed it over the LED. Due to the friction fit, this worked perfectly!<br><br>Thanks for all your ideas.<br><br>Xavier Phx, AZ