Flush-mount clip for Costco/Feit Electric shoplights

In a high-bay at work, we wanted to mount a few of the inexpensive Feit Brand 4000 lumen LED shoplights (available at Costco) to provide task illumination. The trouble was, the mounting hardware provided in the box didn't suit our needs (concrete ceiling with heavy steel girders underneath) and we didn't want to go through the trouble of drilling into difficult materials to use the light's molded-in mounting holes.

So I whipped up this clip that simply presses onto the girders' flanges, and then snaps into the slots on the end of the lamps. 

While the initial model fits girders with 3/8" flanges, it would be simple to modify for other flange dimensions, t-bar drop-ceilings, or even unistrut, to enable tool-less flush mounting in commercial or light-industrial settings.   They're strong enough to hang the lamps under or off-the-side of the girder, and they sit almost as flush as using the OEM screw-holes.

Print with 3-4 perimeters, 0.3mm layers and ~15% infill in basic, DRY, PETG (for flexibility) with the ‘tabs’ sticking up.  Loading the .STEP directly into PrusaSlicer should give the correct orientation. Use the slicer ‘mirror’ function to get the left-hand version. ~15 grams and ~52 min on my Mk3s+ per pair. 

No supports required.

I considered PLA, but the PETG was already in the printer, and I wanted a little give in the detent arm.  ASA or Nylon would probably also work, but there's really no need for extreme strength or UV resistance in most applications.

STEP file provided for them what want to massage it, else drop me a line with dimensions and I'll see what I can do.

Lamp information: Online order from Costco, or search for Feit Electric item number: 1671889.

EDIT: Costco stopped stocking this lamp almost as soon as I posted this model, and replaced it with a version that cannot use the same type of mount. The files will remain here for those who purchased this model of light before they were discontinued.