Microfluorescent T4 Light Fixtures in a pantry
There are some occasions when jargon from the lighting industry can go right over the heads of 95% of the population. Ever heard of the term T4 fluorescent? Or T2, T5, T8, T9, and T16, for that matter? Felt a little out of the loop?
We’ll clue you in:
T stands for tubular, indicating the shape of the bulb.
The number following the T (2, 4, 5, 8, 9, etc) is the diameter of the bulb in eights of an inch. So, a T4 lamp is 4/8” – or more simply, ½”. The T8 is one inch.
If an HO follows the name (such as T5 HO), this stands for high-output, meaning these types of lamps are brighter and draw more electrical current.
If you can you think of any other lighting jargon terms we can clear up for you, let us know in the comments below.
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by Emily Widle
Emily was the E-Commerce Marketing Specialist at Pegasus Lighting until June 2012.
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