Our GLS lamps are rigorously tested for reliability and efficiency. They come in a range of three wattages, 4/6/8 watt, each in a warm white or daylight colour. Lumens vary from 360 to 720 lumens to suit every application. All have a clear glass envelope to further enhance the light output and to fully display the attractive filament arrangement. There is also a choice between BC or ES fittings. All carry a three year warranty (see warranty details for further information).