AS REQUESTED, CUSTOM 3/16 OD (5MM) ACRYLIC TUBE SLIM FESTOON LAMPS FOR YOUR AUDIO NEEDS. FITS FISHER MCINTOSH AND MANY OTHERS. SOME AUDIO APPLICATIONS REQUIRE THE 3/16 OD FESTOON INSTEAD OF THE STANDARD 1/4 OD FUSE LAMPS. THESE LONG LASTING  HIGH OUTPUT  LED CIRCUIT REPLACEMENTS HAVE AN AVERAGE LIFESPAN OF 100,000 HRS.THE AVERAGE INCANDESCENT BULB LIFESPAN IS 1000 HRS. 5MM OD LAMP FITS IN EXISTING LAMP HOLDER CLIPS. REGULATION CIRCUIT AND LEDS (2 LEDS PER LAMP)ARE SELF CONTAINED IN LAMP BODY AND DRAW ONLY 18 MILLIAMPS AS OPPOSED TO THE ORIGINAL INCANDESCENT 150 TO 300 MILLI AMPS. HEAT IS NOT A PROBLEM. LED REPLACEMENT LAMPS ARE HAND ASSEMBLED, TRIMMED FOR OPTIMUM CURRENT DRAW, AND 100 PERCENT TESTED. AS ALWAYS, THANKS FOR LOOKING.