J-type stands for a double ended halogen bulb. T3 stands for a tubular bulb that is 3/8th of an inch in diameter. In fact, some T5s last up to 90,000 hours.Īnswer: T3 and J-type are just different characteristics of the same bulb-type. Although they are the smallest, they are the most energy efficient and brightest. What fluorescent light is the brightest?įluorescent T5s These are the newest development in the fluorescent family. T-5 Glass Wedge Base bulbs are five eighths of an inch or 0.6250″ or 15.875 millimeters in diameter. The T designates that the bulb is tubular in shape. T-5 Glass Wedge Base bulbs are designated by the letter T. So, a T2 bulb and a T3 bulb are shaped the same way the only difference being in the numbers attached to the identifying letters. The letter “T” refers to tubular-shaped lightbulbs, while the letter “A” refers to the commonly shaped arbitrary lightbulbs found in most households. This will save you money and help save the environment.
These tubes will generally use between six and eight times less energy.
#T3 halogen bulb install
T4 (13mm Diameter) They’re compact and easy to install making them perfect for illuminating kitchen counters and worktops as well as under cabinet lighting. T3-1/4 Glass Wedge Base bulbs are three and one quarter eighths of an inch or 0.4063″ or 10.3188 millimeters in diameter. T3-1/4 Glass Wedge Base bulbs are designated by the letter T. These versatile halogen light bulbs are used in desk lamps, wall sconces, torchiers, security lighting, etc and are 78mm or 3 1/8″ long. So, “T” is for Tubular, (but they can also be referred to as the ‘peanut bu… see more. 4 What fluorescent light is the brightest?Ī: The “T” in T3 or T4 type halogen bulbs refers to the tubular shape, (not base) while the number refers to the diameter of the bulb.
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