Old Bulbs = Nuisance Algae?

[Johnny Reefer]

How long ago did the algae start?
Three of how many bulbs in total are new? (Or put another way...how many bulbs are old?).
Is your tank near a window?
Does it get a significant amount of ambient or direct sunlight? I'm a believer that the longer summer days can contribute to algae growth. (Particularly on a new setup. My reef's algae was out of control this time last year. Now that it's been running 18 months, life is good).

Cheers,