LOL, no need to appoligise.
As bulbs age, the spectrum of light they emit tends to shift more towards yellow. Algae tend to prefer more yellow light, even down into the 5,000K range. That's one way we know it's getting time to change our bulbs. How long have you been using the bulbs you currently have. Flourescent bulbs are reccomended for replacement anywhere between 6 months and a year.
IMO a year is really pushing it. I replaced my
PC bulbs every 6 to 8 months.
