Avionics B717 MD80 MD90 LIGHT COMPARATOR Tests luminosity of exit & emergency warning signs. The calibrated reference light source in the light comparator degenerates 10% per year. a new reference light source should be replaced yearly. TAGS: 33 OEM PN:: DB-45-B1 TOMX PN:: N/A Related posts Fuel tank access tableAntenna Connector ProtectorsTERMOHIGROMETER LOGGERPISTOLA DE CALOR BOSCHSLING UNIVERSAL HANDLINGInterior Panel GageB717 LEADING EDGE COVER KITSLIDE SAFETY SIGNINSERT MODULE EXTRACTION TOOLWeighing Scale – 100KG