The minimum dimming level for LED high bay lights depends on the driver and dimming protocol. Premium 0-10V drivers typically dim to 1-5% of full output, while basic drivers may only go down to 10%. DALI drivers can achieve 0.1-1% minimum dimming with the right hardware. TRIAC dimming usually bottoms out at 10-20%. For warehouse and industrial applications with occupancy sensors, a minimum dimming level of 5-10% is usually sufficient for standby lighting when no one is present. For applications requiring very low ambient light (e.g., theaters, corridors at night), specify drivers with 1% or lower minimum dimming. Always check the driver datasheet for the exact dimming range, and test the fixture at low levels to ensure no flicker or color shift.