I want to instal some LED lights into my stairs. The LED light are 1" diameter and I want to fit one every other step. To do this I will need to drill a 1" hole in the side of the staircase. my concern/worry is, will this comply to building regulations, and will it weaken the stairs? Is there anyone who can advise me or give me any information on where i would be able to find the answer.
Thank you in advance!