diff --git a/packages/block-editor/src/components/global-styles/image-settings-panel.js b/packages/block-editor/src/components/global-styles/image-settings-panel.js
index 0ae46605dc2d2..68054cf129e20 100644
--- a/packages/block-editor/src/components/global-styles/image-settings-panel.js
+++ b/packages/block-editor/src/components/global-styles/image-settings-panel.js
@@ -54,13 +54,13 @@ export default function ImageSettingsPanel( {
 					// "RESET" button ONLY when the user has explicitly set a value in the
 					// Global Styles.
 					hasValue={ () => !! value?.lightbox }
-					label={ __( 'Expand on Click' ) }
+					label={ __( 'Expand on click' ) }
 					onDeselect={ resetLightbox }
 					isShownByDefault={ true }
 					panelId={ panelId }
 				>
 					<ToggleControl
-						label={ __( 'Expand on Click' ) }
+						label={ __( 'Expand on click' ) }
 						checked={ lightboxChecked }
 						onChange={ onChangeLightbox }
 					/>
diff --git a/packages/block-library/src/image/image.js b/packages/block-library/src/image/image.js
index d42c7c0435cc8..ae5f749fff3b5 100644
--- a/packages/block-library/src/image/image.js
+++ b/packages/block-library/src/image/image.js
@@ -548,14 +548,14 @@ export default function Image( {
 					{ showLightboxToggle && (
 						<ToolsPanelItem
 							hasValue={ () => !! lightbox }
-							label={ __( 'Expand on Click' ) }
+							label={ __( 'Expand on click' ) }
 							onDeselect={ () => {
 								setAttributes( { lightbox: undefined } );
 							} }
 							isShownByDefault={ true }
 						>
 							<ToggleControl
-								label={ __( 'Expand on Click' ) }
+								label={ __( 'Expand on click' ) }
 								checked={ lightboxChecked }
 								onChange={ ( newValue ) => {
 									setAttributes( {