Reading Time: 5 minutesWhat are Watts, lumens, and Lux? Definition & Meaning Watts measure power, i.e., how powerful a video light is. Lumens are a measurement of light intensity. Lux is the light distribution over distance, meaning it’s an illumination measurement. Lighting is essential to film and video production, so you must familiarize yourself with watts, lumens, and… Continue reading Watts, Lumens, and Lux. What do they all mean?