diff --git a/src/Magnum/Trade/LightData.cpp b/src/Magnum/Trade/LightData.cpp
index ff37ec519..36fb5aca7 100644
--- a/src/Magnum/Trade/LightData.cpp
+++ b/src/Magnum/Trade/LightData.cpp
@@ -51,12 +51,12 @@ LightData::LightData(const Type type, const Color3& color, const Float intensity
 
 LightData::LightData(const Type type, const Color3& color, const Float intensity, const Float range, const Rad innerConeAngle, const Rad outerConeAngle, const void* const importerState) noexcept: LightData{type, color, intensity,
     type == Type::Ambient || type == Type::Directional ?
-        Vector3{1.0f, 0.0f, 0.0f} : Vector3{0.0f, 0.0f, 1.0f},
+        Vector3{1.0f, 0.0f, 0.0f} : Vector3{1.0f, 0.0f, 1.0f},
     range, innerConeAngle, outerConeAngle, importerState} {}
 
 LightData::LightData(const Type type, const Color3& color, const Float intensity, const Float range, const void* const importerState) noexcept: LightData{type, color, intensity,
     type == Type::Ambient || type == Type::Directional ?
-        Vector3{1.0f, 0.0f, 0.0f} : Vector3{0.0f, 0.0f, 1.0f},
+        Vector3{1.0f, 0.0f, 0.0f} : Vector3{1.0f, 0.0f, 1.0f},
     range, importerState} {}
 
 LightData::LightData(const Type type, const Color3& color, const Float intensity, const Rad innerConeAngle, const Rad outerConeAngle, const void* const importerState) noexcept: LightData{type, color, intensity, Constants::inf(), innerConeAngle, outerConeAngle, importerState} {}
diff --git a/src/Magnum/Trade/LightData.h b/src/Magnum/Trade/LightData.h
index a4095953d..8072d6330 100644
--- a/src/Magnum/Trade/LightData.h
+++ b/src/Magnum/Trade/LightData.h
@@ -51,7 +51,7 @@ everything except spotlights.
 You can choose a constructor overload that matches the subset of input
 parameters and let the class set the rest implicitly. For example, a
 @ref Type::Point light constructed using a range will have @ref attenuation()
-implicitly set to @cpp {0.0f, 0.0f, 1.0f} @ce and cone angles to
+implicitly set to @cpp {1.0f, 0.0f, 1.0f} @ce and cone angles to
 @cpp 360.0_degf @ce:
 
 @snippet MagnumTrade.cpp LightData-populating-range
@@ -90,13 +90,14 @@ and provides a good tradeoff for performance while staying mostly
 physically-based. This is modelled after the glTF [KHR_lights_punctual](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual#range-property)
 extension, which in turn is based on the [UE4 implementation](https://github.com/KhronosGroup/glTF/pull/1223#issuecomment-387956919).
 In this case, @ref attenuation() is set to
-@cpp {0.0f, 0.0f, 1.0f} @ce: @f[
-    F_{att} = \frac{\operatorname{clamp}(1 - (\frac{d}{\color{m-info} R})^4, 0, 1)^2}{{\color{m-dim} K_c + K_l d + K_q} d^2} = \frac{\operatorname{clamp}(1 - (\frac{d}{\color{m-info} R})^4, 0, 1)^2}{d^2}
+@cpp {1.0f, 0.0f, 1.0f} @ce, the constant factor is present in order to prevent
+the function from exploding to infinity when @f$ d \to \infty @f$. @f[
+    F_{att} = \frac{\operatorname{clamp}(1 - (\frac{d}{\color{m-info} R})^4, 0, 1)^2}{{\color{m-success} K_c} + {\color{m-dim} K_l d +} {\color{m-success} K_q} d^2} = \frac{\operatorname{clamp}(1 - (\frac{d}{\color{m-info} R})^4, 0, 1)^2}{1 + d^2}
 @f]
 
 If @f$ {\color{m-info} R} \to \infty @f$ as well, the equation reduces down to
 a simple inverse square: @f[
-    F_{att} = \lim_{{\color{m-info} R} \to \infty} \frac{{\color{m-dim} \operatorname{clamp}(} 1 {\color{m-dim} - (\frac{d}{R})^4, 0, 1)^2}}{{\color{m-dim} K_c + K_l d + K_q} d^2} = \frac{1}{d^2}
+    F_{att} = \lim_{{\color{m-info} R} \to \infty} \frac{{\color{m-dim} \operatorname{clamp}(} 1 {\color{m-dim} - (\frac{d}{R})^4, 0, 1)^2}}{{\color{m-success} K_c} + {\color{m-dim} K_l d +} {\color{m-success} K_q} d^2} = \frac{1}{1 + d^2}
 @f]
 
 As a special case, a @ref Type::Directional light is defined by
@@ -306,7 +307,7 @@ class MAGNUM_TRADE_EXPORT LightData {
          * @param importerState     Importer-specific state
          * @m_since_latest
          *
-         * The @ref attenuation() is implicitly set to @cpp {0.0f, 0.0f, 1.0f} @ce
+         * The @ref attenuation() is implicitly set to @cpp {1.0f, 0.0f, 1.0f} @ce
          * for a @ref Type::Point and @ref Type::Spot light and to
          * @cpp {1.0f, 0.0f, 0.0f} @ce for an @ref Type::Ambient and
          * @ref Type::Directional light. See @ref Trade-LightData-attenuation
@@ -329,7 +330,7 @@ class MAGNUM_TRADE_EXPORT LightData {
          * @param importerState     Importer-specific state
          * @m_since_latest
          *
-         * The @ref attenuation() is implicitly set to @cpp {0.0f, 0.0f, 1.0f} @ce
+         * The @ref attenuation() is implicitly set to @cpp {1.0f, 0.0f, 1.0f} @ce
          * for a @ref Type::Point and @ref Type::Spot light and to
          * @cpp {1.0f, 0.0f, 0.0f} @ce for an @ref Type::Ambient and
          * @ref Type::Directional light. See @ref Trade-LightData-attenuation
@@ -359,7 +360,7 @@ class MAGNUM_TRADE_EXPORT LightData {
          * @param importerState     Importer-specific state
          * @m_since_latest
          *
-         * The @ref attenuation() is implicitly set to @cpp {0.0f, 0.0f, 1.0f} @ce
+         * The @ref attenuation() is implicitly set to @cpp {1.0f, 0.0f, 1.0f} @ce
          * for a @ref Type::Point and @ref Type::Spot light and to
          * @cpp {1.0f, 0.0f, 0.0f} @ce for an @ref Type::Ambient and
          * @ref Type::Directional light; @ref range() is always
@@ -378,7 +379,7 @@ class MAGNUM_TRADE_EXPORT LightData {
          * @param intensity         Light intensity
          * @param importerState     Importer-specific state
          *
-         * The @ref attenuation() is implicitly set to @cpp {0.0f, 0.0f, 1.0f} @ce
+         * The @ref attenuation() is implicitly set to @cpp {1.0f, 0.0f, 1.0f} @ce
          * for a @ref Type::Point and @ref Type::Spot light and to
          * @cpp {1.0f, 0.0f, 0.0f} @ce for an @ref Type::Ambient and
          * @ref Type::Directional light; @ref range() is always
@@ -428,10 +429,10 @@ class MAGNUM_TRADE_EXPORT LightData {
          * @f$ \color{m-success} K_l @f$ and @f$ \color{m-success} K_q @f$ in
          * the @ref Trade-LightData-attenuation "attenuation equation". Always
          * @cpp {1.0f, 0.0f, 0.0f} @ce for an @ref Type::Ambient and
-         * @ref Type::Directional light, set to @cpp {0.0f, 0.0f, 1.0f} @ce for
+         * @ref Type::Directional light, set to @cpp {1.0f, 0.0f, 1.0f} @ce for
          * range-based attenuation --- and if @ref range() is
          * @ref Constants::inf() as well, the attenuation equation is simply
-         * @f$ F_{att} = \frac{1}{d^2} @f$.
+         * @f$ F_{att} = \frac{1}{1 + d^2} @f$.
          */
         Vector3 attenuation() const { return _attenuation; }
 
@@ -443,8 +444,8 @@ class MAGNUM_TRADE_EXPORT LightData {
          * the @ref Trade-LightData-attenuation "attenuation equation". If set
          * to @ref Constants::inf(), then:
          *
-         * -    if @ref attenuation() is @cpp {0.0f, 0.0f, 1.0f} @ce, the
-         *      attenuation equation is @f$ F_{att} = \frac{1}{d^2} @f$;
+         * -    if @ref attenuation() is @cpp {1.0f, 0.0f, 1.0f} @ce, the
+         *      attenuation equation is @f$ F_{att} = \frac{1}{1 + d^2} @f$;
          * -    if @ref attenuation() is @cpp {1.0f, 0.0f, 0.0f} @ce, the
          *      attenuation equation is @f$ F_{att} = 1 @f$.
          *
diff --git a/src/Magnum/Trade/Test/LightDataTest.cpp b/src/Magnum/Trade/Test/LightDataTest.cpp
index d3fdddde5..69d56b4a4 100644
--- a/src/Magnum/Trade/Test/LightDataTest.cpp
+++ b/src/Magnum/Trade/Test/LightDataTest.cpp
@@ -60,11 +60,11 @@ const struct {
     const char* message;
 } ConstructInvalidData[] {
     {"invalid ambient attenuation", LightData::Type::Ambient,
-        {0.0f, 0.0f, 1.0f}, Constants::inf(), 360.0_degf, 360.0_degf,
-        "attenuation has to be (1, 0, 0) for an ambient or directional light but got Vector(0, 0, 1)"},
+        {1.0f, 0.0f, 1.0f}, Constants::inf(), 360.0_degf, 360.0_degf,
+        "attenuation has to be (1, 0, 0) for an ambient or directional light but got Vector(1, 0, 1)"},
     {"invalid directional attenuation", LightData::Type::Directional,
-        {0.0f, 0.0f, 1.0f}, Constants::inf(), 360.0_degf, 360.0_degf,
-        "attenuation has to be (1, 0, 0) for an ambient or directional light but got Vector(0, 0, 1)"},
+        {1.0f, 0.0f, 1.0f}, Constants::inf(), 360.0_degf, 360.0_degf,
+        "attenuation has to be (1, 0, 0) for an ambient or directional light but got Vector(1, 0, 1)"},
     {"invalid ambient range", LightData::Type::Ambient,
         {1.0f, 0.0f, 0.0f}, 2.0f, 360.0_degf, 360.0_degf,
         "range has to be infinity for an ambient or directional light but got 2"},
@@ -72,16 +72,16 @@ const struct {
         {1.0f, 0.0f, 0.0f}, 2.0f, 360.0_degf, 360.0_degf,
         "range has to be infinity for an ambient or directional light but got 2"},
     {"invalid point angles", LightData::Type::Point,
-        {0.0f, 0.0f, 1.0f}, Constants::inf(), 15.0_degf, 90.0_degf,
+        {1.0f, 0.0f, 1.0f}, Constants::inf(), 15.0_degf, 90.0_degf,
         "cone angles have to be 360° for lights that aren't spot but got Deg(15) and Deg(90)"},
     {"negative inner spot angle", LightData::Type::Spot,
-        {0.0f, 0.0f, 1.0f}, Constants::inf(), -1.0_degf, 90.0_degf,
+        {1.0f, 0.0f, 1.0f}, Constants::inf(), -1.0_degf, 90.0_degf,
         "spot light inner and outer cone angles have to be in range [0°, 360°] and inner not larger than outer but got Deg(-1) and Deg(90)"},
     {"too big outer spot angle", LightData::Type::Spot,
-        {0.0f, 0.0f, 1.0f}, Constants::inf(), 0.0_degf, 361.0_degf,
+        {1.0f, 0.0f, 1.0f}, Constants::inf(), 0.0_degf, 361.0_degf,
         "spot light inner and outer cone angles have to be in range [0°, 360°] and inner not larger than outer but got Deg(0) and Deg(361)"},
     {"inner spot angle larger than outer", LightData::Type::Spot,
-        {0.0f, 0.0f, 1.0f}, Constants::inf(), 35.0_degf, 30.0_degf,
+        {1.0f, 0.0f, 1.0f}, Constants::inf(), 35.0_degf, 30.0_degf,
         "spot light inner and outer cone angles have to be in range [0°, 360°] and inner not larger than outer but got Deg(35) and Deg(30)"}
 };
 
@@ -222,7 +222,7 @@ void LightDataTest::constructRange() {
         CORRADE_COMPARE(data.type(), LightData::Type::Spot);
         CORRADE_COMPARE(data.color(), 0xccff33_rgbf);
         CORRADE_COMPARE(data.intensity(), 0.8f);
-        CORRADE_COMPARE(data.attenuation(), (Vector3{0.0f, 0.0f, 1.0f}));
+        CORRADE_COMPARE(data.attenuation(), (Vector3{1.0f, 0.0f, 1.0f}));
         CORRADE_COMPARE(data.range(), 15.0f);
         CORRADE_COMPARE(data.innerConeAngle(), 15.0_degf);
         CORRADE_COMPARE(data.outerConeAngle(), 35.0_degf);
@@ -239,7 +239,7 @@ void LightDataTest::constructRange() {
         CORRADE_COMPARE(data.type(), LightData::Type::Spot);
         CORRADE_COMPARE(data.color(), 0xccff33_rgbf);
         CORRADE_COMPARE(data.intensity(), 0.8f);
-        CORRADE_COMPARE(data.attenuation(), (Vector3{0.0f, 0.0f, 1.0f}));
+        CORRADE_COMPARE(data.attenuation(), (Vector3{1.0f, 0.0f, 1.0f}));
         CORRADE_COMPARE(data.range(), 15.0f);
         CORRADE_COMPARE(data.innerConeAngle(), 0.0_degf);
         CORRADE_COMPARE(data.outerConeAngle(), 45.0_degf);
@@ -256,7 +256,7 @@ void LightDataTest::constructRange() {
         CORRADE_COMPARE(data.type(), LightData::Type::Point);
         CORRADE_COMPARE(data.color(), 0xccff33_rgbf);
         CORRADE_COMPARE(data.intensity(), 0.8f);
-        CORRADE_COMPARE(data.attenuation(), (Vector3{0.0f, 0.0f, 1.0f}));
+        CORRADE_COMPARE(data.attenuation(), (Vector3{1.0f, 0.0f, 1.0f}));
         CORRADE_COMPARE(data.range(), 15.0f);
         CORRADE_COMPARE(data.innerConeAngle(), 360.0_degf);
         CORRADE_COMPARE(data.outerConeAngle(), 360.0_degf);
@@ -310,7 +310,7 @@ void LightDataTest::constructNone() {
         CORRADE_COMPARE(data.type(), LightData::Type::Spot);
         CORRADE_COMPARE(data.color(), 0xccff33_rgbf);
         CORRADE_COMPARE(data.intensity(), 0.8f);
-        CORRADE_COMPARE(data.attenuation(), (Vector3{0.0f, 0.0f, 1.0f}));
+        CORRADE_COMPARE(data.attenuation(), (Vector3{1.0f, 0.0f, 1.0f}));
         CORRADE_COMPARE(data.range(), Constants::inf());
         CORRADE_COMPARE(data.innerConeAngle(), 15.0_degf);
         CORRADE_COMPARE(data.outerConeAngle(), 35.0_degf);
@@ -326,7 +326,7 @@ void LightDataTest::constructNone() {
         CORRADE_COMPARE(data.type(), LightData::Type::Spot);
         CORRADE_COMPARE(data.color(), 0xccff33_rgbf);
         CORRADE_COMPARE(data.intensity(), 0.8f);
-        CORRADE_COMPARE(data.attenuation(), (Vector3{0.0f, 0.0f, 1.0f}));
+        CORRADE_COMPARE(data.attenuation(), (Vector3{1.0f, 0.0f, 1.0f}));
         CORRADE_COMPARE(data.range(), Constants::inf());
         CORRADE_COMPARE(data.innerConeAngle(), 0.0_degf);
         CORRADE_COMPARE(data.outerConeAngle(), 45.0_degf);
@@ -342,7 +342,7 @@ void LightDataTest::constructNone() {
         CORRADE_COMPARE(data.type(), LightData::Type::Point);
         CORRADE_COMPARE(data.color(), 0xccff33_rgbf);
         CORRADE_COMPARE(data.intensity(), 0.8f);
-        CORRADE_COMPARE(data.attenuation(), (Vector3{0.0f, 0.0f, 1.0f}));
+        CORRADE_COMPARE(data.attenuation(), (Vector3{1.0f, 0.0f, 1.0f}));
         CORRADE_COMPARE(data.range(), Constants::inf());
         CORRADE_COMPARE(data.innerConeAngle(), 360.0_degf);
         CORRADE_COMPARE(data.outerConeAngle(), 360.0_degf);