| Cats do tend to be sensitive to this sort of stuff. Your cat definitely reacted to the lights' presence, but didn't seem threatened--no hissing or yowling or diving under the bed. Given that, and given that things in your life have been very positive, and given that these are lights, not shadows or something ominous-looking (although you can't always judge by appearances), my instinct is that, yes, these are beneficient presences.
If they come back, try to have a conversation with them. Let them know that they are welcome in your home and in your life only if they hold the highest, best intention for you, but that you do honor and respect them. You might even want to make some small offering for them, or an altar for them. As to the details of how to do this--pick your tradition! Every culture and faith has its own method, all about the same in broad points, but with different details. Or use your imagination! They like it when we use our imaginations.
They may well be a species of "fairy." Your choice of that term may be guided. There are some things to understand about the Old Powers of the Earth. They are not put into our hands, for our use. They are not our tools or our pets. Nor are they gods, and are not worth our worship. But they are powerful. They should not be feared, but they should be treated with love and respect and honor. They are holy, and they are inhuman, and we should be careful not to anthropomorphize them--they have their own purposes, and we can work in partnership with them, but we cannot expect human mercy or human forgiveness, or human cruelty, from them, if we misuse them.
Again, try not to be afraid. Trust your instincts, and trust your luck. It will be interesting to see if your luckiness changes since you told them to leave. If so, you may want to invite them back.
Blessings!
Alder | 
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