How far or near should you be to the light. Box did not contain instructions
There are a few options depending on how long you'd like to use the lamp during each session. They include:
10 inches for 30 minutes
14 inches for 60 minutes
20 inches for 120 minutes
You can find the user manual here: https://cdn.shopify.com/s/files/1/0240/6504/8681/files/P805_TheraLiteUserGuideUL_01.pdf?17844
Hope this helps!