FLUORESCENT LIGHT BULB 4 PIN ENERGY SAVING 28W 38W SLIM LAMP TUBE 2D. 28W & 38 Watts. The Compact Fluorescent Bulb are a Low Energy, High Light output bulb, ideal for use in many area's such as in Security Lights, Warehouses, Storage Spaces, Garages as well as many other areas where a bright light is required.