lights

[props]

you might want to find out if the ballast you have is a pulse or a probe style ballast.. tar ballast were design for probe start style bulbs but i've seen some where its a pulse start... ushio and most european bulbs [ie. radium] run on a pulse start style ballast..
heres a good link
http://www.aquarium-lighting-guide.c...al_halide_ansi