According to the manufacturer, the LED technology of the Kind LED K5 XL1000 Grow Light provides a 50,000 hour lifespan that lasts 5x longer than traditional bulbs, which means you have less maintenance and more growing without a drop in quality of light. You can also refer to the manufacturer's product manual for more detailed product information.
Per the manual for the Kind LED K5 XL1000 Grow Light, it is recommended to start with a light 48 inches above the canopy for a 3-7 day acclimation period. After this, the recommended height is 30-36 inches above the canopy. While all plants are different, it is recommended to keep a mimimum distance of 24 inches between the light and the canopy.