Philips 135103 54W T5 High Output Natural Light 5000K Linear Fluorescent Alto Light Bulb (40 Pack), 46'Color:Daylight (5000K) | Style:54-Watt This Philips 54-watt Natural Light Linear Fluorescent light bulb brightens laundry rooms, bathrooms, garages, basements, or workspaces. Versatile for multiple applications, this 4100-Kelvin Fluorescent bulb is suitable for indoor, commercial, and residential use. Features a Miniature Bipin base. Low-mercury design creates a smaller environmental footprint. Philips reuses as much glass and packaging material as possible, reducing environmental impact. Lamp life of 25,000 hours. This product ships as a 40-pack and comes with a 3-year warranty.