Adding an LED lamp to your desk/furniture can be useful but you always have to find the switch that is dangling down on the cable somewhere.

This model is designed to take the switch and clip it onto the side of a 20mm thick table top.

If you have a 40mm thick top (I.e. a Sewing table) then use this model here:

No supports required, print in whatever filament and colour you wish.

Place a small drop of superglue in the holes before pushing the spigots of the base into them, wait a little then clip onto your desk and enjoy easy on/off.