These diffused finish 40W R50 Reflector light bulbs (R50 = 50mm diameter) emit the familiar warm white light of traditional incandescent reflector light bulbs, and the SES-E14 small Edison screw (14mm) cap will fit existing light fixtures, making it easy to find a direct replacement for your current light bulbs.R50 reflectors are commonly used for general lighting, desk light bulbs and some decorative table light bulbsIncandescent 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 (with the exception of specialist light bulbs that have no energy-saving alternative).Special purpose traffic signal grade light bulbs are a great replacement for the incandescent filament light bulbs that have been in use for so long. They are sturdier than traditional light bulbs and are most commonly used for the illumination of traffic lights and other roadside lights.