This is a premium quality 38 Watt 2D Energy Saving compact fluorescent lamp with 4 pin base (GR10q). This energy efficient 2D (PL-Q) lamp has an average life of 8,000 and has an A class energy efficiency rating. premium 38w 2D lamps are available in colours warm white 827, standard white 835 or cool white 840. Length:195mm Width:195mm Please note - These lamps should be replaced like for like. If you have an 38w lamp in your fitting, it must be replaced with an 38w lamp. You cannot reduce or increase the wattage.If you are replacing a different branded 38w 2d we can 100% assure that this item will be a suitable alternative.