Bulbs are no longer available. Take a picture of the end of the bulb where it plugs in. I may have a brand new set of bulbs for it. That will get you a year of use
Looks like a 4x96 watt coralife aqualight power compact fixture. I'm fairly certain those used the 4 pin parallel "euro style" plug, not the square pattern japanese one.
Back in the day, you had half 10k bulbs and half actinic. Plug it into a simple appliance timer and you're growing corals.