The GLS light bulbs universal shape enables these LED versions to retrofit directly into existing fixtures with minimum effort.They are distinctly more efficient than the incandescent versions they are designed to replace, consuming only 5.5W of power yet producing light of an equivalent brightness to 40W filament light bulbs. This remarkable efficiency - when considered alongside each light bulbs vastly improved longevity and reliability - can potentially reduce your lighting bill by up to 90% whilst simultaneously reducing carbon emissions.With a frosted finish and thermal plastic casing this LED GLS light bulb dissipates heat more effectively than comparable materials, placing less strain on its components and thus extending its longevity even further. This results in a range of GLS light bulbs that is reliable, green, elegant and easy to install.Not suitable for dimming. Recommended for Indoor lighting use only. Instant full light. Features a commonly used ES-E27 Edison screw (27mm) cap/base. Also known as an A60 light bulb.This GLS is a newer product from Crompton Lamps and supercedes their old GLS part codes: 7321, LGES8WW, RS40PES.Need more help in choosing a suitable light bulb? Read our guide What is a GLS Light Bulb.