Lifespan of MH bulbs for plant growth
Hi all -
I am so glad I found this forum!
I have two grow lights. Ones is running a 600W Sunmaster Cool Deluxe MH Conversion Bulb, the other a 1000W BT37 Sunmaster Blue Burning Metal Halide Lamp. I ran them last fall - winter - spring for tropical and subtrop bonsai and succulents for about 2500 hours overall.
When have they reached the end of their useful lifespan for plants? I was thinking about replacement - but do I need to do that yet?
Thanks very much in advance!