I assume you mean for romantic dinner and so on, not for sex?
I grew up in a mixed Deaf household and my auditory comprehension sucks sometimes.
I find that dim lighting is just fine to see what someone is saying. This can be accomplished with a fireplace and enough candles, really, or those fancy lights you can buy that are colored, or draping colored semi-transparent cloths over lights. Reading lips is harder in dim lighting than understanding ASL, in my opinion.
When we'd go camping, often just the campfire was enough for the Deaf members of the family to talk and understand.
As for... more intimate encounters, again, candle or dimmed colored lighting has always been plenty for me to understand, and a LOT can be accomplished through touch, to communicate without words.
Do you have any more specific questions? Part of the problem is I've never particularly "created" romantic space... romantic for me has always been going out to a nice restaurant, or cuddling together on the couch. Haha. And I like sex equally with the lights on (so I can watch) and off, heh.