What does the "F" stand for?

HitchHiker

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I have been research fluorescent lighting and have a good understanding of the differences between the different "T"s (i.e. T12,T8,T6,T5), but what does the "F" refer to (i.e. F4 F12 F13 F14)?
 

pepetj

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F stands for linear fluorescent, the numbers next to it represent the wattage of that lamp. F10 means linear fluorescent 10W; F24T5HO means linear fluorescent 24W 5/8" diameter lamp High Output

Pepetj
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HitchHiker

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Sweet so a F54T5HO would be your standard 48" 54 W T5HO?

Would FC then mean a Compact Fluorescent?
 
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sirdarksol

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Yes to the first part of that question. That's what I'm working with for my aquarium.
 

mathas

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Would FC then mean a Compact Fluorescent?
FC should stand for "fluorescent circline", which means the bulb is circular, but it wouldn't surprise me if some manufacturers didn't adhere to that.

In , the bulb code is FC12T5, meaning the tube itself is 5/8" in diameter, but it forms a torus with a 12" outer diameter. In , however, the bulb code begins with FC30, and the 30 indicates that it's a 30W bulb. There doesn't seem to be a lot of consistency on what the number after the FC represents on circline bulbs, sometimes its outer diameter and sometimes its energy consumption.
 
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HitchHiker

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Great thanks for the info, so basically a FC bulb is one that circular, but there is no standard as to what the number after the FC designation means. Great info thanks for all the help.
 
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