diff --git a/docs/knownlimitations.md b/docs/knownlimitations.md
index b22aa5a3..9ea99f13 100644
--- a/docs/knownlimitations.md
+++ b/docs/knownlimitations.md
@@ -7,6 +7,11 @@ such sensors and known workarounds if they exist.
 
 #### Grove Sensors
 
+ * **Grove LCD RGB Backlit** (JHD1313M1) requires 5V and should be used with an
+ external power supply connected to the board to function properly. Although
+ some high powered USB ports might be enough, in most cases you will encounter
+ dropped characters, washed out text and/or failed I2C writes while using USB
+ power alone.
  * **Grove I2C Touch Sensor** (MPR121) v1.3 is incompatible with the Intel
  Edison using the Arduino board, but will work with the Mini-breakout if
  supplied with at least 4V. Revision v1.2 works well on all Intel boards.
@@ -35,6 +40,9 @@ such sensors and known workarounds if they exist.
  Edison with the Arduino board.
  * **Grove I2C Motor Driver** is not compatible with the Intel Galileo due to
  the inability to change the I2C bus speed to 100 KHz.
+ * **Grove Digital Light Sensor** (TSL2561) may have an unstable connection on
+ the Intel Edison using the Arduino breakout that results in missed I2C reads.
+ This is usually applicable when the I2C lines are pulled-up to 5V.
  * **Grove CO2 Sensor** will return zeroed data and is unusable on the Intel
  Galileo.
  * **Grove BLE** (HM-11) does not return data on the Intel Galileo board due to