This led strip clip is for some cheap Aliexpress led strip with a small diffuser in the middle.
The strip is 10mm large and about 0.4mm thick with a diffuser bump of about 3mm large and 2mm tall.

I designed this clip to be held by two tiny nails. This can be held by one or two nails.

I recommend to print this with heat resistant filament since led strips can get pretty hot.