Set of 4 modern adjustable brushed steel recessed downlights. Suitable for all rooms, guestrooms, hallways, kitchens, lounges & utility rooms. 11.7 cm height x 9.4 cm diameter. Cut out required 8.3 cm. This product is suitable for use with LED bulbs and when paired with a dimmable bulb can be dimmed. This product is compatible with most domestic smart light bulbs. Always check bulb length against product dimensions to confirm suitability. 4 x 50W Max GU10 Halogen (required). Class I - Earthed for your safety. With our 1 year warranty, we offer the highest level of customer service; we take pride in supporting our customers, and work hard to ensure you always receive a first class service. Symple Stuff