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Sizes
The size of a bulb is determined by the measurement of its diameter. This measurement is expressed in increments of an eighth of an inch.

For an example, an A-19 is 19 eighths inches or 2 3/8 inches in diameter. A 4' T12 fluorescent tube is
12 eighths inches or 1 1/2 inches in diameter. A 4' T8 fluorescent tube is 8 eighths inches or 1 inch in diameter.

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All information is accurate to the best of our knowledge. No liability is assumed by Feit Electric Company for inaccuracies or errors. Content is subject to change without notice. Please contact our customer service department to verify specifications. © Copyright 2011 Feit Electric Company, Inc. All Rights Reserved.