Have you considered woods that fluoresce? I made a list with approximate hardnesses last year because I got curious about it. I’ve never even heard of a lot of these, so I don’t have a clue about suitability or availability.
Albizia 1,020#
Amendoim 1,780#
Coffeetree 1,390#
Lebbek 1,330#
Locust, Black 1,700#
Locust, Honey 1,580#
Mango (heartwood) 1,070#
Myrtle (heartwood) 1,270#
Pistachio 1,930#
(After looking at my list I realized you just did a Ltd. with Mango. Haven’t seen any black light pics yet though.)