There are a lot of personal-use, hydroponic growers of leafy greens like lettuce, herbs, etc. LED-retrofitted troughers/high bays using 6500K LED tubes are an excellent, cost effective lighting solution. Yet, it is surprising how difficult it is to find single-ended, 6500K led tubes. These fit the bill, and they are priced well. Note that they advertise an L70 of 50,000 hours. I cannot personally verify that, unfortunately, but that is higher than many other tubes I have seen if it can be b...