Philips PL-C bulbs have a high light quality and are frequently used in downlights to light places like hotels, shops and offices. These places in particular need a high level of lighting. The PL-C CFL bulbs are available in multiple colour temperatures and can be bought with a 2-pin base (to be used with a conventional ballast) and a 4-pin base (to be used with an electronic ballast). Are you looking for an even more durable version of the PL-C energy saving bulb that also lasts much longer? Take a look at the PL-C LED bulbs of Philips!