diff --git a/src/UI/Components/Modal/LightModal.tsx b/src/UI/Components/Modal/LightModal.tsx
index 6a8186efb..fe519a80d 100644
--- a/src/UI/Components/Modal/LightModal.tsx
+++ b/src/UI/Components/Modal/LightModal.tsx
@@ -192,7 +192,7 @@ export class LightDataCom extends React.Component<ILightComponentProps, {}> {
                             {
                                 let min: number = 0;
                                 let max: number = 10;
-                                let step: number = 1;
+                                let step: number = 0.1;
 
                                 switch (k)
                                 {
@@ -235,10 +235,11 @@ export class LightDataCom extends React.Component<ILightComponentProps, {}> {
                                         min={min}
                                         max={max}
                                         stepSize={step}
-                                        labelStepSize={20}
-                                        value={parseInt(lightData[k])}
-                                        onChange={(val) =>
+                                        labelStepSize={10}
+                                        value={parseFloat(lightData[k])}
+                                        onChange={(val: number) =>
                                         {
+                                            val = parseFloat(val.toFixed(1));
                                             this.ChangeSkyLightIntensity(val, k);
                                             lightData[k] = val;
                                             app.Viewer.UpdateRender();
diff --git a/src/UI/Components/RightPanel/SunLightGui.tsx b/src/UI/Components/RightPanel/SunLightGui.tsx
index 1943407e0..28f1733e3 100644
--- a/src/UI/Components/RightPanel/SunLightGui.tsx
+++ b/src/UI/Components/RightPanel/SunLightGui.tsx
@@ -351,10 +351,11 @@ export default class SunLightGui extends Component
                         <Slider
                             min={0}
                             max={6}
-                            stepSize={1}
+                            stepSize={.1}
                             value={this.store.sunLightIndirectLightingIntensity}
                             onChange={async (val) =>
                             {
+                                val = parseFloat(val.toFixed(1));
                                 await this.SetSunLightIndirectIntensity(val);
                                 app.Viewer.UpdateRender();
                             }}