EIKI EIP-U4700 Ballast hack/LED replacement

[netham45]

I've been working on replacing the ballast/bulb in my EIKI EIP-U4700 with an LED panel. I purchased a logic analyser to reverse the ballast<>mainboard protocol and was able to trick the system into thinking the ballast is running
( https://gist.github.com/netham45/52d06f7095c579679fcce3ec5b27e6a1 ) and I've put a 100W COB LED into the projector. Going to attach the manual for the ballast of this projector to this post in case anyone else wants to mess with it in the future, I was able to find it after capturing some of the protocol.

It's working, I'm typing this post from it, but it's really dim and I can't figure out exactly how to brighten it. It's almost adequate for a movie in a completely dark room. With the stock bulb I could see it just fine in a brightly-lit room. With this LED COB I can barely tell it's on in a lit room.


Right now I'm using this assembly: https://www.amazon.com/gp/product/B01D1LD68C and it's not quite as focused as I'd like.

Is there a better type of lens to use to focus this? Something like the above but a Fresnel lens or something that'll get it down to a small point to shine more efficiently through the projector's optics?

Compared to the bulbs I was using I'm impressed with the colors the projector is doing (cheap bulbs look yellow-ish), and it's completely uniform on brightness and solved some dark spots I had.