diff --git a/docs/communication.md b/docs/communication.md
index 85b2dd2..7892f25 100644
--- a/docs/communication.md
+++ b/docs/communication.md
@@ -10,10 +10,21 @@ The following table describes the bit pattern for a successful communication wit
 
 ## Message Types
 
-| Code | Purpose         |
-| ---- | --------------- |
-| 0    | Data            |
-| 1    | Control         |
-| 2    | Status Messages |
-| 3    | Confirmation    |
-| 4    | Debug           |
+| Code | Purpose              |
+| ---- | -------------------- |
+| 0    | Light Data           |
+| 1    | Control Signal       |
+| 2    | Status Messages      |
+| 3    | Confirmation Message |
+| 4    | Debug Info           |
+
+### Light Data
+
+- 1-Byte-block per lamp: 0-255
+- Index of lamp determinded by order
+
+### Control Signal
+
+- Index Byte + [ **t** <sub>oggle</sub> | **i** <sub>ncrease</sub> | **d** <sub>decrease</sub> ]
+- on
+- off