The brightness of a rocket flame can vary depending on several factors, including the type of fuel, combustion conditions, and the specific rocket engine design. Unfortunately, it is challenging to provide an exact measurement of the brightness of a rocket flame in terms of lumens because the characteristics of rocket flames are quite different from standard light sources.
Lumens are a unit of measurement commonly used to quantify the total amount of visible light emitted by a light source that is visible to the human eye. However, a rocket flame produces light through a combination of incandescence, chemiluminescence, and fluorescence, which differ significantly from the emission of a typical light bulb or LED.
Rocket flames generate intense heat and emit a broad spectrum of light, including visible light as well as ultraviolet (UV) and infrared (IR) radiation. The UV and IR components of a rocket flame are not perceivable by the human eye and are not accounted for in lumens.
Moreover, the brightness of a rocket flame can be affected by the distance from the observer, atmospheric conditions, and the angle of observation. These factors further complicate the quantification of brightness in lumens.
Instead of measuring the brightness of a rocket flame in terms of lumens, scientists and engineers often rely on radiometric measurements or spectroscopic analysis to characterize the emitted radiation and understand the combustion processes involved.
In summary, due to the complex nature of rocket flames and their unique characteristics, it is not straightforward to provide an accurate measurement of their brightness in lumens.