Continuous light vs flash.
Compare illumination timing and how you work with it. Either source can be shaped into hard or soft light.
An authored comparison across shared dimensions. The useful choice depends on the photograph and your workflow.
| What matters | Continuous light ↗ | Flash ↗ |
|---|---|---|
| Illumination timing | Light is present throughout the capture. | A burst is timed to the photograph. |
| Observing the scene | You can observe the actual lighting while positioning the subject. | Test captures help evaluate the burst; some systems include a modelling light. |
| Subject movement | Shutter time governs the duration over which motion is recorded. | A short burst can limit blur when it dominates the subject illumination. |
| Video | Dedicated continuous lights can illuminate video as well as stills. | A normal photographic flash burst does not illuminate an entire video recording. |
| A useful way to decide | Editorial suggestion: try this when seeing the lighting continuously helps your setup. | Editorial suggestion: consider this when controlled burst illumination serves your still-photo idea. |
Try naming your own constraint first: time, flexibility, lighting or editing control. The trade-off becomes more useful when you know what you need.