yeah, that's too much. unless of course, if you are growing live plants or something then that's good. and you WILL have algae blooms, the nasty kind too.
That does seem a lot of lighting but it also depends how deep your tank is.
Arcadia offer an arowana tanning lamp for red arowana's as it emits uvb. It is also a lower wattage than halide lighting would so saving you money on your electricity bill.