I've been using ELFX for a while now and personally found it does for interior lighting exactly what I'd hoped for. Dungeons and mines are finally stressful environments and it's possible to sneak up on a bandit and nearly stumble into one before realizing they're actually there! Finding loot almost always requires a torch or candlelight spell.
I'm not using an ENB (I'm using an MSI GT72 Dominator laptop) at this point, and being rather olde skool (I date back to when floppies were actually floppy) I'm not sure I actually need one to satisfy my own visual enhancements in the game. I love that ELFX gives me absolutely no performance hits regardless of where I'm at - though I'm positive this is due to my being ENB free.
I'm wondering what people think about the Exteriors version. I've not used it yet due to comments suggesting that it causes conflicts with games-in-progress (fire outside of fire pots, etc.) and I've got a single profile with a level 50+ character that I don't want to mess up. I'm contemplating creating another profile in MO just to test it out, but would really like to hear impressions of it. I've tried a couple of Lighting mods for exteriors and find I always compare them to what ELFX has achieved with interiors and then promptly delete said lighting mods. They just don't succeed for me. If ELFX exteriors is even 3/4 as good as the interiors, I'm sold.
On a side note, for those of you using ELFX interiors and are disappointed that Hearthfire created homes still use vanilla lighting, this mod by Scrabbulor is a decent "fix" though isn't quite as lovely as ELFX. I've been using it in my play through for about a week now and have had no issues at all. Improved Hearthfire Lighting - https://www.nexusmod...im/mods/60637/?