If you had an array of high power addressable LEDs, how would you project them onto a wall? Perhaps you’d use a Fresnel lens, or maybe an individual lens on the top of each. [Joo] faced this problem ...

The Neewer CSF10 Fresnel Lens is the kind of lighting modifier that you may never have heard of before, but which could turn out to be very useful. It’s well made and works with high-powered lights.