I usually install LED fixtures like kitchler for under cabinet lighting but this time the client wants led strip lighting. The client did purchase UL product like i told them. They purchased 60 watt 24 volt driver for the longest strip that is 8 feet at 5 watt per foot = 40 watts thats 1.7 amps. I told them to have the supplier provide the wire we need from the driver to the strip light for us, I think the supplier provided 22 Gauge class 2 wire it could be 18 but not sure untill saturday. My question is the driver will be about 12 to 15 feet away. I have 18-2 class 2 and 16-2 class 3p left over from another jobs, because the driver is 12 feet to 15 feet away I am thinking I should use the 16-2 gauge CL3P to be safe or would 18-2 be OK.