Light Intensity

Light intensity is how bright the light falling on a scene is. When you film or record video it matters a lot, because the camera can only record detail when the light level suits it. The same scene can look clear, flat or unusable depending on how intense the light is.

Too little and too much

If a scene is too dark, the audience cannot see detail: faces blur into shadow, colours dull and it becomes hard to follow what is happening. Low light or night filming is complex and needs the right techniques and equipment, such as:

• a faster lens with a wider aperture, which lets more light reach the sensor
• a higher ISO setting, which makes the sensor more sensitive to the light that is there, though it adds grain
• additional lighting, such as a small LED panel placed near the subject

Very bright light can be harsh. Bright patches on a face lose their detail and the picture looks washed out. Light levels like this need to be controlled, using diffusers to spread and soften the light, filters to cut down what reaches the lens, or shading to block light from part of the scene. More light is not automatically better; it has to be the right amount.

Making intensity mean something

Your lighting choices should support the meaning of the video and engage the audience, not just make things visible. Soft, even light looks calm and welcoming, so it suits a friendly interview or a step-by-step demonstration where you want the viewer to relax and concentrate. Harsh, contrasty light with deep shadows feels tense or unsettling, so it suits a mystery scene set in a dusty attic. It is the effect that matters: how the light makes the audience feel, or what it helps them understand.