is there anybody over there who knows a tracer it is strongly fluorescent
under a normal UV light source. i am running a macro-scale test upto 5 feet. a
good tracer under microscopic scale usually does't work well in this
situation. any info or recommendation is welcome and preciated. i don't mind
it is toxic or not, as well as price and emission color.
p.s.: a normal UV light source should be 2-4 bulbes and be put 3-5 ft away
from object interests.