PHILIPS TL5 lamps are one of the most energy efficient lamps. Often more economical if even LED bulbs if you look at Lumen / Watt! Not for nothing is the (T) ube (L) ight bulb still the most commonly used lamp.
PHILIPS MASTER TL-5 is currently one of the most used fluorescent lamps in offices, factories, schools, shops, etc. The Philips Master TL-5 series with 13 mm cap is something more economical than the TL-D lamp. The thickness of this tube is 16mm.
TL5 lamps usually go 20% longer than the regular MASTER TL-D, especially when they are provided with a soft start. Philips Master TL-5 lamps always have an electronic ballast.
EXTRA efficient fluorescent lamps are the Philips Master TL5 HE ECO and the Philips Master TL5 HO ECO Here are small "profits" are met. Although true for the ECO, less wattage but also less light! 
