Surefire E1B Diffuser

It's 9-10-18, and Hurricane Florence is coming to visit. Well, not me personally, but it looks like she might be visiting the Carolinas. With that in mind, I thought about what I could make that might be useful. Then I made this instead.

FYI, the E1B this is designed for is 8 years old. I have no idea if it will fit the current, or even a newer, generation of this light. The ID of the diffuser is 25.5mm. The OD of my flashlight bezel (at the end) is 25.3mm.