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The GLS (General Lighting Service) is a traditional design of light bulb , and been in use for over a century. Also known as the traditional pear shape, which is the most well known bulb shape. It has the classic, pear-like bulb shape and its versatility means it is still one of the most popular types of lightbulb available today. It may be used in a variety of lighting fixtures, whilst the older incandescent bulbs were considered a huge energy consumer, the switch to LED has brought life back to traditional GLS bulbs. Look at our products below to find your perfect, cheap LED bulb.