Thank you WillC and drdawg! I appreciate your input and advice. Yes, definitely overdoing the google searching and causing some needless worry, it seems... I think you're right that brown spots have been from too little water and not enough direct light. I moved my FLF again yesterday to a brighter spot and so far so good... they are now about 5.5ft away from our heating vent, but it's not an aggressive unit and I'm hoping this will be ok. I'll try to post some pics soon too