Just a few questions to watch for.
- Is it growing or just inflating in an attempt to expose more of it's xoanthellae to the available light source?
- Is it eating or is it spitting the food back out when you're not looking?
- With regard to light, who's to say what is or is not enough? There are over 300 different strains of xoanthellae that all have different lighting needs that are hosted by hundreds of different types of cnidarians. I've seen a friend keep an RBTA under a single normal output light for years.
With regard to color, my personal observation has been that when an anemone bleaches that it usually keeps its color tint but gets lighter. An anemone that is white when it's bleached will usually be brown when it recovers. Some white anemones (usually sebae) are white naturally.
- Believe none of what you hear and only half of what you see.