In astronomy, luminosity is the amount of energy a body radiates in unit time.
Stellar luminosities are usually expressed in solar luminosities, sometimes the absolute bolometric magnitude is given instead, what is related to the luminosity.
In X-ray and radiowavelengths, luminosity is sometimes expressed in watts.
... continued, aided by data from the British Aerospace EAP prototype which had first flown in 1986, and culminating in the first flight of the Typhoon prototype in 1994 ...