These pearl finish 60W GLS light bulbs emit the familiar warm white light of traditional incandescent light bulbs, and the BC-B22d bayonet (22mm) cap will fit existing light fixtures, making it easy to find a direct replacement for your current GLS light bulbs. Also known as an A55 light bulb with a classic opal/satin look.This is a special purpose traffic signal grade light bulb and is sturdier than a traditional light bulb. They are most commonly used for the illumination of traffic lights and other roadside lights. Not suitable for household room illumination.Incandescent GLS light bulbs have been in short supply since the EU introduced a phased ban on them several years ago. Since September 2018, all incandescent light bulbs have been banned from sale in the UK.Need more help in choosing a suitable light bulb? Read our guide What is a GLS Light Bulb.