Hi Are thes bulbs any good for the hobby ?

Metal halide 250w
Hsi-td 250w/ndl uvs
Initial luminous Flux (lm):20.000
luminous efficacy ( lm/w);80
Correlated colour temperature (k):42000
Colour rendering index (class):1B

Rated average life 9000 hours
with uv stop

I have 2 complete alloy heads and Im not fully Clued up on this sort of thing