Maxspect R420R Nano Lens question

[ReefBeez]

Hello,

I bought a Maxspect razor nano 60w 16k LED light off someone on craigslist. It came with a 120 degree lens and whatever the stock lens may be. I was wondering if anyone knew how to tell the difference. It looks to me like they are identical. They are both white with square that open up to circle/octagons. I can tell a difference.

thanks for the help

 

[dz6t]

The stock lens is black and the 120 degree lens is white.