LED Spotlight with Diffuser

I liked the Par64 Spotlight by Domonoky, but I needed something shorter.

Note: This was designed with this mount in mind: https://www.thingiverse.com/thing:2881135

Modifications to the original part include the following:
- The spotlight body is much shorter.
- The spotlight body includes a hole for LED wiring.
- The vents are functional rather than decorative.
- Uses standard M3 screws (along with printed washers) to attach U-bracket.
- All but one part will print without supports (U-bracket needs a tiny amount).

Additions to the design include:
- An LED Holder, which accommodates seven 5mm LEDs.
- A diffuser, which should be printed in "clear" or "natural" PLA.
- A retaining ring, which prevents the diffuser from falling out the front.

Body Assembly:
- Print one of each part except the washers.
- Print two washers.
- Insert M3 screws of an appropriate length through the holes in the U-bracket.
- Place one washer on each M3 screw.
- Place spotlight body into U