Which is more associated with how we perceive light?

The choice of photometry is indeed aligned with how we perceive light. Photometry specifically focuses on the measurement of visible light as it relates to human vision. This field takes into account the sensitivity of the human eye to different wavelengths of light, thus emphasizing how we quantify light in relation to its perceived brightness or luminance.

In photometry, various metrics such as luminous flux, illuminance, and luminance are used to describe light in a way that corresponds to human viewing conditions. This makes it particularly relevant for applications like lighting design, where understanding how light is perceived by the human eye is crucial for creating environments that are visually comfortable and effective.

While radiometry involves the measurement of all electromagnetic radiation (including ultraviolet and infrared), it does not specifically address human perception. Spectrophotometry measures the intensity of light at various wavelengths but focuses more on the physical properties of the light itself rather than how it is perceived by the eye. Colorimetry deals with the quantification of colors and the way different colors are interpreted, but again, it is more about color perception rather than the broader context of light perception. Thus, photometry stands out as the most relevant choice when discussing human perception of light.