Philips MASTER SOX-E lamp is a low-pressure sodium vapor lamp with a U-shaped discharge tube enclosed in clear outer glass. This Master SOX-E is a commonly used sodium lamp in public lighting. The color reproduction is monochromatic (in a small light spectrum) and gives yellow light. Highest lumen / watt ratio of all gas lamps.
Application . This SOX-E is used for lighting streets, tunnels, parking places and other general public places where safety plays a role. Often wall or ceiling fixtures (in or on) and lampposts. The MASTER SOX-E lamps with black BY22d lamp base are used with an electronic ballast.
Lifetime of the MASTER SOX-E. Dropout of 20% at 12,000 hours and 50% failure at 18,000 hours on electronic ballasts. The light yield at 25 ° C is 100-206 Lm / watt. This Master SOX-E lamp is NOT dimmable.
Available in the lamp color display 1700K (yellow orange) and in the wattages 35W, 55W, 90W, 135W and 180W. Color fastness (Ra) is 44. Fire resistance H110 (35 and 55W). 
