I guess blue light bulbs don't last very long compared to normal incandescents, I have bought other brands but the zoo med do seem to last the longest. My lights are on probably 10 to 12 hours per day. I probably replace every six months, I always buy two at a time. Use for aquatic turtle so maybe that's why they don't last as long . Once every 6 months with the burn time I have probably just fine
Rating: [5 of 5 Stars!]