Source: https://restorebunny.com/guides/clamshell-lighting-fill-comparison/

# Clamshell Lighting: Compare Main Light and Lower Fill

Evaluate the main light before adding a lower fill source or reflector. The second element should solve a visible shadow problem rather than simply making the portrait brighter.

Portrait lighting2 min readUpdated 19 October 2026

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Quick answer

## The short version

Evaluate the main light before adding a lower fill source or reflector. The second element should solve a visible shadow problem rather than simply making the portrait brighter.

## A capture or editing plan

Make a test with the upper light alone. Add a reflector or lower source and compare the shadows under the chin and around the eyes. Reduce the lower contribution if it reverses the apparent light direction or removes more shape than intended. Check any reflection in glasses and inspect bright clothing near the lower source. Save both test frames for a clear comparison.

## When to change the approach

Two bright sources can flatten the face and create distracting reflections. A quieter fill may better support the expression and surface texture.

## Worked planning example

Planning example: A lower reflector opens a dark chin shadow, but a stronger lamp creates bright reflections in both lenses. Choose the reflector version after checking that the eyes remain visible.

## If the first attempt fails

If lower fill makes the face look flat, compare the main-light-only frame and reduce the lower contribution before changing the main light. Check the shape of the chin shadow and the brightness of lower catchlights. A reflector and a powered fill are not interchangeable settings, so record which was used. Keep a little modeling where it supports the intended portrait rather than maximizing brightness everywhere.

## Before you finish

1. Keep a main-light-only test.
2. Compare the lower source's strength.
3. Inspect glasses and lower-face highlights.

## FAQs

What should I check first for clamshell lighting?

Keep a main-light-only test. Compare the lower source's strength. Inspect glasses and lower-face highlights.

## Sources

Sources for technical facts and documented capabilities. Worked scenarios are hypothetical planning examples.

- Adobe: [Portrait lighting techniques](<https://www.adobe.com/creativecloud/photography/discover/portrait-lighting.html>)
- Profoto: [Clamshell light and lower fill](<https://www.profoto.com/lu/en/still-photography/tips-tricks/how-to-create-clamshell-lighting>)

## Related

- [Compare two image versions](<https://restorebunny.com/tools/image-difference-checker/>)
- [Butterfly Lighting: Check Eyes as Well as the Nose Shadow](<https://restorebunny.com/guides/butterfly-lighting-eye-shadows/>)
- [Use Rim Light Without Losing Hair and Shoulder Detail](<https://restorebunny.com/guides/rim-lighting-hair-separation/>)
- [Browse all photo guides](<https://restorebunny.com/guides/>)

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