Electronic ballast philips HF-Pi 2 x 28/35/49/80 TL5 EII for fluorescent lamps equipped with automatic recognition of the connected lamp and able to independently adapt its operating parameters exactly to the respective lamp. This results in a substantial advantage, especially for T5 lamps, as it means that TL5 HE and HO lamps of the same length can be interchanged. With a choice of seven ballasts, the customer can efficiently handle every possible combination of bulbs. The ballast designed primarily for indoor applications. For outdoor application, the luminaire must be of minimum class and must be sufficiently protected against water and dust. The installation should also be protected from any lightning or any other necessary electrical protection as deemed in such installation and typical application. 7-connection output .