REPLACES 100 WATT SYLVANIA OSRAM LAMP 68846, BLE-100S/M,MX507320 WITH A MODERN HI QUALITY LED LAMP, WHICH ONLY CONSUMES 36 WATTS.MEETS BOTH ASTM 3022 AND RRES90061 SPEC FOR LED BLACKLIGHTS...FITS DIRECTLY IN BLACKLIGHT HOUSING LIKE MAGNAFLUX ZB-100F, OR GOULD BASS OR MAGWERKS..UNLIKE OLDER MERCURY VAPOR LAMP , THIS LED LAMP MAINTAINS ITS BRIGHTNESS THRUOUT ITS LIFE ,3800uW/CM2 AT 15 INCHES>>SCIENTIFIC INSTRUMENTS BRAND...IT DOES NOT REQUIRE ANY WARM UP TIME TO REACH FULL INTENSITY, AND IT HAS A 30,000 HOUR LIFE, MUCH LONGER THAN A MERCURY LAMP.. magnaflux part # 507320 BLACKLIGHT USED TO HOUSE LED LAMP MUST BE FAN COOLED VERSION LIKE ZB-100F>>we ALSO sell the hand unit with fan and bulb with cert for 650 usd