diff --git a/examples/3d/lightmaps.rs b/examples/3d/lightmaps.rs
index a033493fca0e1..7601acc86c8bd 100644
--- a/examples/3d/lightmaps.rs
+++ b/examples/3d/lightmaps.rs
@@ -8,7 +8,7 @@ fn main() {
         .add_plugins(DefaultPlugins)
         .insert_resource(AmbientLight {
             color: Color::WHITE,
-            brightness: 0.2,
+            brightness: 0.0,
         })
         .add_systems(Startup, setup)
         .add_systems(Update, add_lightmaps_to_meshes)
@@ -36,9 +36,15 @@ fn add_lightmaps_to_meshes(
         (With<Handle<Mesh>>, Without<Lightmap>),
     >,
 ) {
+    let exposure = 250.0;
     for (entity, name, material) in meshes.iter() {
+        if &**name == "Light" {
+            materials.get_mut(material).unwrap().emissive = Color::WHITE * exposure;
+            continue;
+        }
+
         if &**name == "large_box" {
-            materials.get_mut(material).unwrap().lightmap_exposure = 120.0;
+            materials.get_mut(material).unwrap().lightmap_exposure = exposure;
             commands.entity(entity).insert(Lightmap {
                 image: asset_server.load("lightmaps/CornellBox-Large.zstd.ktx2"),
                 ..default()
@@ -47,7 +53,7 @@ fn add_lightmaps_to_meshes(
         }
 
         if &**name == "small_box" {
-            materials.get_mut(material).unwrap().lightmap_exposure = 120.0;
+            materials.get_mut(material).unwrap().lightmap_exposure = exposure;
             commands.entity(entity).insert(Lightmap {
                 image: asset_server.load("lightmaps/CornellBox-Small.zstd.ktx2"),
                 ..default()
@@ -56,7 +62,7 @@ fn add_lightmaps_to_meshes(
         }
 
         if name.starts_with("cornell_box") {
-            materials.get_mut(material).unwrap().lightmap_exposure = 120.0;
+            materials.get_mut(material).unwrap().lightmap_exposure = exposure;
             commands.entity(entity).insert(Lightmap {
                 image: asset_server.load("lightmaps/CornellBox-Box.zstd.ktx2"),
                 ..default()