if its plastic no worrys
but as a plasterer you would be better off with a couple of florrys with a few meters of flex
this way it shows up any lumps in the plaster when a pendnt wont
i have about 5 made up for temporery lights
next time your on site and ya see sparky rippin out a few florrys grab em!
lol
what you suggest is ok but theres no gard on the light which is a bit dodgey
ss