When do I replace T8's used for lettuce
I grow lettuce year round under T 8's. Two years ago I put in Sylvania Cool White, FO32/741/ECO. Box says 28,000 lummens and 24,000 hours. Also says 78 CRI and 4100K.
I estimate they have been on about 11,000 hours (365 x2x 15 hours.
Should I replace them now? If so, with same or similar from HD or Lowe's?