
I bought 6 F8T5/CW fluorescent bulbs to light up my RV patio. Holds 2 lightbulbs. Here is their lifespan. 02/01/2018 Both patio lights replaced. October 6, 2018 Both patio lights replaced. 8 months May 22, 2019 Replaced both patio lights. 7 months 2 weeks 8 October 2019 Both patio lights replaced. 4 months. About a year and seven months for the six lamps I bought on January 24, 2018. To replace the patio lights, I either lay down a folding ladder (stowed in the storage compartment) to remove the two bulbs, or hang from the top step of my door, use a Phillips head to loosen a screw, and slide the cover off. I will not continue. Longevity is important to me. If I can get at least the same lifespan from one lightbulb as I can from these three, then less time will be left hanging on my van door. If you use them under the counter and don't mind changing them more often, then do what makes you happy. I give 3 stars. (Sylvania, GE brand lamps, etc.) They still work today, almost a year and 6 months later. The two branded bulbs I bought in HD all 6 bulbs outlasted. I would not recommend Circle Brand bulbs due to their short lifespan.