20k halides

[bv_reefer]

just a quick question, my two halide bulbs are both 20k's but aren't blue.
for example when they're heating up in the first minute there really a deep blue tone, but when they stabilize after a minute or two they become a typical whiter color, not a yellower tint persay such as 6k's, but just not as blue as one would expect from 20k's, any ideas? ballasts reflectors maybe? the reflectors shouldn't be a factor there good quality polished aluminum, it's a pendant fixture, two reflectors