Philips 280925 25W T8 Natural Light 5000K Alto Linear Fluorescent Ii Light Bulb (30 Pack), 3' This Philips 25-watt Natural Light Linear Fluorescent light bulb brightens laundry rooms, bathrooms, garages, basements, or workspaces. Versatile for multiple applications, this 5000-Kelvin Fluorescent bulb is suitable for residential use, as well as for commercial use in general, decorative, and architectural lighting. Features a Medium Bipin Base. Low-mercury design creates a smaller environmental footprint. Philips reuses as much glass and packaging material as possible, reducing environmental impact. This product ships as a 30-pack and comes with a 2.5-year warranty.