1. This tool is designed to help demonstrate how our new lens can block the 400nm~420nm range of High Energy Visible(HEV)light in addition to UV light. 

2. The kit uses AA batteries X 8.

3. Open the battery box and place the batteries. Please ensure that+/-is correct.

4. Make sure that the switch of the battery box is on.Please press the main power switch.

5. The kit can run continuously for up to 10 houre, so when the light brightness starts to decrease,please change the 8 batteries at that time.