I will assume you mean fluorescent tubes
They are different caps
Since T5 bulbs are shorter than their T12 or T8 counterparts, they do not naturally fit into fixtures designed for T12 or T8 bulbs. Luckily, there are companies that offer retrofit kits that can allow you to use T5 bulbs in fixtures not designed for them. A company called Lumiversal makes two different types of these retrofits. These retrofits are a great way to save money and electricity plus you can rebates and incentives from your utility providers to help cover the cost.
LED tube T8 is much coarser than the LED tube T5 T8 is about 3 cm in diameter ,the diameter of T5 is about 1.5 cm. LED tube T8 Power : 36W (120 centimeters ) 30W (100 centimeters ) 18W (60 centimeters ) LED tube T5 Power : 28W (110 centimeters ) 21w (88 centimeters ) 14W (55 centimeters ) 8W (30 centimeters ) The distinction between T8 and T5 LED tube lamps, and their advantages and disadvantages : The difference between T8 and T5 is the thickness , T8 circumference is 8 cm , T5 circumference is 5 cm . The LED tube T5 has less light decay, longer life, but the lower electro-optic efficiency (the emitted light consuming 1W power ). The LED tube T8 has the more light fades , shorter life, but the higher electro-optic efficiency (the emitted light consuming 1W power). The diameter of LED tube T8 is 24MM LED tube T5 is 16MM in diameter Regular LED tube T8 diameter is 1 inch , 1 inch = 25.4mm, 25.4mm multiply 3.14 = 80mm = 8cm, ie 8 cm .LED tube T5 is 5cm
Yes a T12 lamp socket will take a T8 tube. The T8 tube will not operate. The T8 ballast is an electronic ballast where as the T12 ballast is a magnetic type. If you are changing over fluorescent fixtures to the smaller T8 lamps then the ballast has to be changed and the end sockets have to be rewired. The schematic on how to do the rewire is on the electronic ballast's label.
If you are looking to cut down your energy consumption, I would suggest you get T5 fluorescent bulbs instead of T8 bulbs. You will save a good amount of energy with them compared to your T8 bulbs and T5 bulbs are much brighter than LEDs. LEDs do consume less watts but they are not nearly as bright plus they are very expensive to buy and maintain. You have to be careful if you want to get T5 bulbs though since they are a little shorter than T8 bulbs and do not naturally fit into their fixtures. Luckily, there are companies that make retrofit kits that come with the bulbs and everything you need to convert the fixtures. Also, right now there are a lot of incentives and rebates that you can get from the government and utility companies to help cover the cost and lower your payback period.
In fluorescent tubes the number represents the diameter of the tube. The tubes are measures in 1/8ths of an inch. T8 would be 8/8ths or 1 inch. T5 would be 5/8ths of an inch. Older fixtures took T12 which would be 12/8ths or 1.5 inches.
Low Voltage three Phase Single Speed Three Phase Wye L1:T1,T7 L2:T2,T8 L3:T3,T9 Join Wires T4,T5,T6 Three phase Delta L1: T1,T6,T7 L2:T2,T4,T8 L3:T3,T5,T9 High Voltage L1:T1 L2:T2 L3:T3 Join T4and T7, T5 and T8, T6 and T9
There are t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t15, and t20 sizes.
The T8 tubes are usually associated to fixtures with electronic ballasts whereas T12 tubes are used in magnetic ballasts. The tubes can not be transposed because the socket wiring is different. If you are converting a magnetic ballast to an electronic ballast the wiring diagram is on the label of the ballast.
The terminology T8 suggests to me that the fixture is a fluorescent fixture. These types of tube fixtures need a ballast to make the tubes ignite. If you are trying to operate this type of fixture on 220 volts, you will need a ballast that requires a 240 volts input voltage source.
A T8 lamp can be retro fitted into a T12 fixture by replacing the T12 ballast with a T8 ballast. The end sockets also have to be rewired in the retrofit as the wiring from the electronic ballast to the sockets is completely different.
Divide 20A by the Amps listed on the label of each fixture ballast. A T8 bulb will use an electronic ballast. They generally run 1A for four 4 foot bulbs. Try 15 four bulb fixtures per circuit and use a 20A rated switch.
These tubes need a ballast to operate the tubes. The current and voltage will be marked on the fixtures ballast.