@Rich: why not just dip the LED into acetone, which would soften the plastic, and press it against a cloth or something to roughen the exterior? It will diffuse the light quite nicely, I should imagine.
I'm using Adafruit's NeoPixel Strips -- the main reason for putting a 1cm diameter disk of tranclucent film in front of them is to make it look cool, even when it's turned off
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.