Wiring sets of 2, 15" LED strips to illuminated switch. 12 sets total -- to power supply
24 x 15" / 39.6 ["/m] = 9.09 m or two 5m reels.  There are many grades of colour, brightness and Watts/m.  But I suspect any PC PSU can power this off the 12V rail drawing about 25W to 75 W total depending on W/m specs.