Ultra-Bright H Type Track Lighting Heads, Energy-Saving 12PCS 6000K Cool White 20W 2400lm for Accent Lighting, Dimmable LED Track Lighting Ceiling Spotlight FixtureHigh Brightness & Energy SavingAlthough our track lighting head is brighter than two GU10 bulbs, it is energy efficient and provides high brightness with an aperture of up to 2. 36 inches, reaches 2400 lumens, ideal for large space and places that needs accent lighting. Compatible with H Type RailThese track lighting heads are suitable for the H type 3 wire 1 circuit track lighting system. Please check your track type before ordering, this H track