Man ill tell you. I'm very impressed with Spider Farmers Service. I had sent them a message asking if they sold a dimmer for that light i got from Lesso. Of course that was before i had researched and found out how to dim the light at the ballast. They never once ask me for an order number or where i got the light. Anyway, they said they didn't make a dimmer for that light. So i sent them a message back and told them what i found in my research and this is what they sent me.
Greetings from Spider Farmer.
Yes, you can adjust the hole with ADJ letter to adjust the light.
Turn clockwise to lighten and turn counterclockwise to darken.
If you have any further questions in the future, please feel free to contact us any time and we will be happy to assist you.