BELL 60062 4 watt ES-E27mm Blue Coloured LED Filament GLS Bulb. These Blue coloured light bulbs offer fantastic light output and offer long life hour, whilst looking stylish. Ideal for festoon light fittings, the clear glass bulb has an amber LED filament. Perfect for bars, restaurants, show rooms and around the home. Standard ES-E27mm screw cap. 80+ CRI rating.