Application Note Lamp wiring for 'TL'5 and PL-T circuits in luminaires Philips Lighting Business Unit Lighting Electronics & Gear Lamp wiring for 'TL'5 and PL-T circuits in luminaires Introduction Historically, lamp voltages (under normal conditions) for 'TL'D, PL-L and PL-C lamps have always been below 200V. Lamp components and lamp wiring could have the same voltage rating as normal mains voltag