Lighting discrepancy between ue4 SM5 and ES2

Hi there!

I’m currently working on a project in Unreal intended for html5. I’m an artist and have no experience in building for mobile platforms. The project was originally intended for desktop, but a quick change to HTML5 has me scrambling.

Looking at the documentation, it appears as though I can’t use physical light values any longer, as mobile doesn’t support post processing exposure. I’m trying to eyeball light values, but between the lighting built in the editor and how things look in ES2 preview, I can’t seem to get any satisfying results. The ES2 displays my lights as completely blown out, and any non static objects blow up as well. Am I not going about this the right way? I’m hoping to get arch viz quality smooth lighting, akin to this