General Description: Philips 42 watt 4100K PL-T triple tube 4pin fluorescent light bulb. This light has amalgam technology which provides uniform light over a wider temperature range. The new design has a longer life of 16,000 hours on average (3hrs per start). It can be used with dimming ballast. It has Philips Alto design making better for the environment. This compact fluorescent light bulb has a h1gh CRI of 82 and produces 3200 lumens of light output.