I designed a mod that allows you to install a led array in the og Anycubic Photon (basicaly the same as the Photon S). It speeds up the print times and prints evenly across the lcd.
the part: https://www.alibaba.com/product-detail/InGaN-High-Quality-LED-LG-Chip_62425958779.html?spm=a2700.galleryofferlist.0.0.12fe573bnLfNvq&s=p
you can find it on aliexpress aswell.
I used ASA plastic as it can handle the temprature and the uv light. But I wrapped the inside with aluminium tape just to reflect the heat and uv light anyway.
To mount you wil need to move the motherboard to the side (you need to flip the handle outwards). The Led takes 24v, as the photon only gives 12v you wil need to solder the converter of the original led (12-24v) to the converter of the new led (24-50v). This is highly inefficient, a better way to do this is to use a single step up converter from 12v-50v. Another good idea to get a stronger light output may be to upgrade the psu to something that can take more amps than the 6A it does now. (These 2 things I mentioned are not essential)
Something worth noting is that my Photon shipped with the new Photon S board but I don't thing there would be any issues using the older one.