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The Planck energy divided by the Planck time is the Planck power, equal to about 3.62831 × 1052 W. This is an impractically large unit; even gamma-ray bursts, the most luminous phenomena known, have output on the order of 1 × 1045 W, less than one ten-millionth of the Planck power---and indeed, exceeding 1/4 of the Planck power will produce an event horizon under general relativity[citation needed].
In terms of the fundamental constants of physics, it is given by
- Planck power =
.
