ClueLuma

T-number lamp diameter calculator

The T designation expresses tube diameter in eighths of an inch.

Units
Diameter=T-number8\text{Diameter} = \frac{\text{T-number}}{8}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

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in

Worked example

Given

  • T-number\text{T-number} = 8 —
Diameter=88=1\text{Diameter} = \frac{8}{8} = 1

Symbols and units

SymbolMeaningUnit
Diameter\text{Diameter}lamp diameterin
T-number\text{T-number}tubular lamp size designation—

Related calculators

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.