The Speedo comes that way, but the tach comes w/ a std. bulb. Dime City sells a special LED/Bulb for a couple of $ to convert. The Tach has two wires coming out the back for the backlight, tug them out and the bulb / socket comes out. Like a rubber plug. Switch the bulb / LED put it back together. I dont think Dime City sells red LED's though but they would look good too.
the speedo might have to be dissassembled, cause the dozen or so wires that come out of it are hard wired, but there is two screws on the back to hold it together, i imagine thats how you'd replace a blown-out bulb.