Bulb Compatibility Notice Supports MR16, GU5.3, GU10 and E27 bulbs. Only flat bulbs with a maximum diameter of 50mm (1.96 inches) can be used. Bulbs that are too large are not suitable. Bulbs and sockets are not included. Recessed Installation Design Requires ceiling cutout for installation, creating a clean, flush-mounted look. Perfect for modern interior lighting upgrades. Product & Opening Dimensions - Outer size: 6.89in (175mm) L × 3.62in (92mm) W - Opening size: 6.5in (165mm) L × 3.15in (80mm) W - Fits standard ceiling cutouts for easy retrofitting. Adjustable Lighting Angle Each lamp head can be adjusted to direct light precisely, ideal for highlighting decor, artwork, or task areas. Durable & Versatile Structure Made of high-quality aluminum for heat dissipation and corrosion resistance. Double-head design provides dual lighting sources, suitable for both residential and commercial use. Upgrade your indoor lighting with our square double-head recessed downlight housing, specially cut for ceiling installation. Important Note: This product does not include bulbs or lamp holders. Please purchase compatible bulbs separately. It supports MR16, GU5.3, GU10 and E27 bulbs, with a maximum diameter of 50mm (1.96 inches) for flat bulbs. The adjustable lighting Angle allows you to customize the beam direction, while the durable aluminum structure ensures long-lasting performance. It is highly suitable for accent lighting in living rooms, corridors and commercial Spaces