Pack of four 70 degree lenses (optics) for the AI Sol, replacing the existing 40 degree lenses with these 70 degree ones will give a wider spread of light, but sacrafice some intensity.
More details can be found at
Steps to change the lenses
•Remove the white plastic housing using a small allen wrench.
•Carefully lift the housing from the heatsink watching the power and data ports.
•Remove the 4 middle lenses and replace with the wide lenses.
•CAREFULLY reassemble the plastic housing being sure that all of the 8 lenses are correctly lined up with the LEDs. If they are not lined up correctly, there is a possibility of damaging the LED pucks.
•THE USER ASSUMES ALL RISKS INVOLVED IN REPLACING THE LENSES AND ANY DAMAGES THAT MAY OCCUR FROM DOING SO ARE NOT COVERED UNDER WARRANTY.