diff --git a/cmd/humidity/read.go b/cmd/humidity/read.go
index 88e4f04..1f30db1 100644
--- a/cmd/humidity/read.go
+++ b/cmd/humidity/read.go
@@ -6,6 +6,7 @@ import (
 	"os"
 
 	"github.com/go-flucky/flucky/pkg/logfile"
+	"github.com/go-flucky/flucky/pkg/rgbled"
 	"github.com/go-flucky/flucky/pkg/types/typeswitch"
 
 	"github.com/go-flucky/flucky/pkg/cli"
@@ -35,8 +36,14 @@ var readHumidityCmd = &cobra.Command{
 			sensors = cnf.GetHumiditySensorsByName(args)
 		}
 
-		ctx := context.Background()
+		if len(sensors) == 0 {
+			return
+		}
 
+		rgbLEDs := cnf.GetRGBLEDs(config.ENABLED)
+		rgbled.Run(rgbLEDs)
+
+		ctx := context.Background()
 		measuredValues, err := sensor.Read(ctx, sensors)
 		if err != nil {
 			log.Fatalln(err)
@@ -44,7 +51,6 @@ var readHumidityCmd = &cobra.Command{
 
 		measuredValues = typeswitch.HumidityValues(measuredValues)
 
-		// print humidities on stdout
 		cli.PrintMeasuredValues(measuredValues, cnf, os.Stdout)
 
 		if logs {
@@ -54,6 +60,8 @@ var readHumidityCmd = &cobra.Command{
 				log.Fatalln(err)
 			}
 		}
+
+		rgbled.Off(rgbLEDs)
 	},
 }
 
diff --git a/cmd/temperature/read.go b/cmd/temperature/read.go
index d645a8f..8b81c74 100644
--- a/cmd/temperature/read.go
+++ b/cmd/temperature/read.go
@@ -18,7 +18,6 @@ import (
 )
 
 var logs bool
-var temperatureUnit string
 
 var readTemperatureCmd = &cobra.Command{
 	Use:     "read",
@@ -32,9 +31,6 @@ var readTemperatureCmd = &cobra.Command{
 			log.Fatalln(err)
 		}
 
-		rgbLEDs := cnf.GetRGBLEDs(config.ENABLED)
-		rgbled.Run(rgbLEDs)
-
 		// fetch all temperature sensors or sensors by args
 		sensors := make([]sensor.Sensor, 0)
 		if len(args) == 0 {
@@ -43,6 +39,13 @@ var readTemperatureCmd = &cobra.Command{
 			sensors = cnf.GetTemperatureSensorsByName(args)
 		}
 
+		if len(sensors) == 0 {
+			return
+		}
+
+		rgbLEDs := cnf.GetRGBLEDs(config.ENABLED)
+		rgbled.Run(rgbLEDs)
+
 		ctx := context.Background()
 		measuredValues, err := sensor.Read(ctx, sensors)
 		if err != nil {
@@ -73,5 +76,4 @@ func init() {
 	readTemperatureCmd.Flags().BoolVar(&logs, "logs", true, "Log temperature")
 	readTemperatureCmd.Flags().BoolVar(&compression, "compression", true, "Compress measured with logged temperatures")
 	readTemperatureCmd.Flags().Float64VarP(&round, "round", "r", 0.25, "Round values. The value 0 deactivates the function")
-	readTemperatureCmd.Flags().StringVar(&temperatureUnit, "temperature-unit", "celsius", "Temperature unit")
 }