Helvar EL2x55ngn5 2X55W PLL/TC-L HF BallastHelvar EL2x55ngn5 2X55W PLL TC L HF Ballast Helvar Electronic High Frequency Ballast for TC L PLL Lamps. This low profile HF ballast is designed perfectly for to fit in PLL fittings. This ballast covers twin 55W PLL lamps. Lifetime up to (h): 60000 Input voltage: 220 V 240 V Lamp type: TC L (55 W) Start Options: Warm Start Dimming: No Energy Efficiency Class: A2 BAT Dimensions: 360mm L 30mm W 21mm H Fixing Centers 350mm