ROUND BATHROOM SURFACE MOUNTED FLUSH CEILING DOWNLIGHT: The Astro Vancouver Round Bathroom downlight finished in polished chrome features a contemporary design made from steel DIMMABLE FIXED INTERIOR LED SPOTLIGHT: This downlight delivers great performance in the bathroom, hallway or any living area. Ambient lighting is delivered through the decorative acrylic diffuser and can be dimmed when paired with a dimmable bulb POLISHED CHROME WITH GLASS: Made from a steel construction, the Vancouver is a high-quality, durable ceiling light and is supplied with Astro's 3-year guarantee REQUIRES GU10 BULB: The Vancouver requires 1 x 6W Max LED GU10 bulb, which you will need to purchase separately. A cut-out diameter of 89mm / 3½ in and a recess depth of 150mm is required FIXINGS & INSTRUCTIONS: All Astro products are supplied with clear and comprehensive instructions for installation SMART BULB COMPATIBLE: This product is compatible with most domestic smart light bulbs. Please check bulb length against product dimensions to confirm suitability