diff --git a/libraries/AP_SerialLED/AP_SerialLED.cpp b/libraries/AP_SerialLED/AP_SerialLED.cpp
index 03f132dc48..50573bf34a 100644
--- a/libraries/AP_SerialLED/AP_SerialLED.cpp
+++ b/libraries/AP_SerialLED/AP_SerialLED.cpp
@@ -30,17 +30,17 @@ AP_SerialLED::AP_SerialLED()
 // set number of LEDs per pin
 bool AP_SerialLED::set_num_LEDs(uint8_t chan, uint8_t num_leds)
 {
-    if (chan >= 1 && chan <= 16 && num_leds <= 32) {
+    if (chan >= 1 && chan <= 16 && num_leds <= 64) {
         return hal.rcout->set_neopixel_num_LEDs(chan-1, num_leds);
     }
     return false;
 }
 
-// set RGB value on mask of LEDs. chan is PWM output, 1..16
-void AP_SerialLED::set_RGB(uint8_t chan, uint32_t ledmask, uint8_t red, uint8_t green, uint8_t blue)
+// set RGB value on LED number. LED number -1 is all LEDs. First LED is 0. chan is PWM output, 1..16
+void AP_SerialLED::set_RGB(uint8_t chan, int8_t led, uint8_t red, uint8_t green, uint8_t blue)
 {
     if (chan >= 1 && chan <= 16) {
-        hal.rcout->set_neopixel_rgb_data(chan-1, ledmask, red, green, blue);
+        hal.rcout->set_neopixel_rgb_data(chan-1, led, red, green, blue);
     }
 }
 
diff --git a/libraries/AP_SerialLED/AP_SerialLED.h b/libraries/AP_SerialLED/AP_SerialLED.h
index acc845e04a..4bf90d43b6 100644
--- a/libraries/AP_SerialLED/AP_SerialLED.h
+++ b/libraries/AP_SerialLED/AP_SerialLED.h
@@ -27,8 +27,11 @@ public:
     bool set_num_LEDs(uint8_t chan, uint8_t num_leds);
 
     // set RGB value on mask of LEDs. chan is PWM output, 1..16
-    void set_RGB(uint8_t chan, uint32_t ledmask, uint8_t red, uint8_t green, uint8_t blue);
+    void set_RGB_mask(uint8_t chan, uint32_t ledmask, uint8_t red, uint8_t green, uint8_t blue);
 
+    // set RGB value on LED. LED -1 is all LEDs. LED 0 is first LED. chan is PWM output, 1..16
+    void set_RGB(uint8_t chan, int8_t led, uint8_t red, uint8_t green, uint8_t blue);
+    
     // trigger sending of LED changes to LEDs
     void send(void);