About the candle lighting ceremony - tie it to planting trees in Israel. Plant a tree in Israel for each of the honorees and hand the certificates.
Another idea that I heard of for the candle lighting ceremony (I read about it somewhere on this site) is a "flower planting" ceremony. Put together a silk flower arrangement that each honoree / group of honorees will plant. Then donate the arrangement to a charity organization.
Mazal Tov!
