Philips - Dimmable LED - 17w GLS ES Warm White. £52.50. The new Philips 75w equivalent LED GLS bulb, its unique design radiates warm light in all directions, making it a true alternative to the incandescent lamp. It is particularly suitable for public areas such as lobbies, corridors, stairwells, where the light is always on. It only uses 17w of electric saving you an incredible 80% on your electric costs and lasts for more than 15 years.