How long do Phalaenopsis orchids bloom?

[Joshaeus]

Hi everyone! My sister purchased a Phal orchid (which we subsequently named 'Blush') from a grocery store in January and gave it to my mom as a gift. A few days later I set it up in a passive hydroponics system, with clay media and sitting in a pool of seedling-strength hydroponic solution, and (since it is in a north window with the window shade blocking it) set it up with an 800 lumen, 5000K daylight bulb for 12 hours a day on a timer (keeping the leaves at about 1000-1500 footcandles depending on where the light meter is placed...not 100% sure what the PAR is, but plugging that value into a lux to PPFD calculator suggests 185 umol per second for 1000 footcandles, and this orchid has noticeable red tones in the leaves). Three months later and it's still blooming - it's only had a single bloom shrivel during that period, and the remaining blooms are still pristine. How long do phals hold their blooms for, and when do they typically rebloom? I included some pics for reference...thanks