Philips Energy Saver Compact Fluorescent Non-Integrated (CFLni) 13W PL-C 4-pin base light bulb is ideal for use in kitchens and offices. It offers significant energy savings in a compact size and provides a soft, white light. This light bulb should only be used in fixtures with an electronic ballast. Philips Energy Saver CFLni light bulbs can be used in the following fixtures: Surface mounted downlight fixtures, Wall washing fixtures. Energy Savings made simple. Philips Energy Saver Compact Fluorescent Non-Integrated (CFLni) replacement light bulbs offer significant energy savings, high light output and a broad portfolio of design solutions for your everyday needs. They come in several different shapes, sizes and bases and are ideal for interior lighting applications.