The "T" number on your fluorescent bulb is the diameter in 1/8"s thus a T-12 is 1 1/2", a T-8 is 1" and a T-5 is 5/8". Check with your power company for rebates but last time I tried I couldn"t get money to replace T-12s as they figured they should all be gone already and the ability to get them might force you to replace them anyway. I looked at LED retro fits a few years ago, they were expensive and weren"t that much different than High Efficiency t-8s. It"s pretty simple look a the Lumens (light out put) to watts ratio, of course the more lumens per watt the better. Find the lumen output on your old bulbs to see what you had to get an idea of how happy you"ll be with your new lights. Something that set back high efficiency lighting was when engineers spec replacements with a lower lumen output, turned a lot of government unionized employees against any energy savings in lighting.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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