Typical diameters are t12 or t38 1 1 2 in or 38 mm for residential lamps with magnetic ballasts t8 or t26 1 in or 25 mm for commercial energy saving lamps with electronic ballasts and t5 or t16 5 8 in or 16 mm for very small lamps which may even operate from a battery powered device.
T8 t12 bulbs difference.
Conversion kits are available with a ballast allowing t5 bulbs to fit t8 and t12 fixtures.
Fluorescent lamps or fluorescent linear tubes as they are also known are categorized according to their wattage shape and diameter.
Although brightness is basically the same less energy is used by the t8.
A more popular choice for fluorescent lighting are the second generation t8 bulbs.
As we describe in our how to article t8 and t12 feature the same g13 bi pin connector.
T8 fluorescent bulbs are just as bright as the t12 and much more economical.
T8 lamps have a 1 inch diameter and t12 lamps are 1 5 inches in diameter.
T8 and t12 both feature the same g13 bi pin connector.
In an effort to make led tube lights compatible with the internal dimensions of most fixtures you will find that most led tube lights feature a t8 or 1 inch diameter.
Difference between t5 t8 t12 tubes what is the difference between t5 t8 and t12 lamps.
The t in t5 indicates the bulb is tubular shaped while the 5 denotes that it is five eighths of an inch in diameter.
The t12 runs on a magnetic ballast and a t8 operates on an electronic ballast.
Both lamps use the same bi pin base meaning that users can fit t8 lamps into sockets designed for t12 lamps.
For example a typical t5 bulb is 46 inches long rather than the 48 inches 4 foot of t8 and t12 bulbs.
The t8 tubes are slightly smaller at 1 inch in diameter compared to the 1 5 inch diameter of t12 tubes.
T8 fluorescent bulbs are one inch in diameter and feature a medium bi pin base similar to the t12 bulbs.
A t12 lamp measures 1 5 inches 12 8 1 5 or 3 81 cm while a t8 lamp measures 1 inch 8 8 1 or 2 54 cm in diameter.
The t12 is 1 5 inches in diameter and the t8 is 1 inch in diameter.
In short the difference between t5 t8 and t12 lights are the sizes and energy efficiency.
T8 bulbs have a luminous efficacy of 80lm w making them a step up from the 70lm w of t12 bulbs.
A 48 inch t8 lamp produces 2 600 design lumens using 32 watts while the same size t12 lamp produces 2 520 design lumens using 40 watts.
The smaller t5 and t8 tubes use less energy and have less mercury in them than t12 bulbs.
These are the basic different characteristics of each different fluorescent lamp type that is most commonly used in offices and commercial industrial lighting all across the world.
T8 tubes are simply 1 inch in diameter versus the 1 5 inch diameter of t12 tubes.
The t8 models cost almost half of the t12.
The t12 fixtures tended to use magnetic ballasts.
