For those hobbyists that have purchased the SOL 70/70 with the included 40 degree lenses please observe the images below for easier I.D
Note that the 70 degree lens has a circular marking at the center of the Puck optics and the optics are slightly wider where they meet the LED at the main board surface.
![](https://www.theaquariumsolution.com/sites/default/files/styles/large/public/articles/lens_lg.jpg?itok=VQV-wj_5)