Reliable lighting MASTER PL-L is ideal for use as ceiling lighting when higher levels of lighting are required. The bridge technology developed by Philips ensures optimal performance with more light and higher efficiency at high temperatures in the luminaire. The lamp can be operated with electronic HF ballast. MASTER PL-L 4P - Compact fluorescent lamp without integrated ballast - Lamp power EM 25°C, nominal: 24 W - Energy Efficiency Label (EEL): A