Try applying them with some epoxy like JB Weld. Worked like a charm for me on a JD ROPS I installed a couple of working flood lights on. Never moved at all, and popped off with a hammer and a good stiff putty knife.
You could do the same with a steel strap or plate to mount lights.
No holes drilled to suit the safety nazis or engineering police.
Clickbond products are made for exactly this application and far better than JB Weld.
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