Confirmed on Samsung Galaxy S4 Android 4.4.2 running MCPE 0.10.5 in both creative and survival modes.
The top surface of any blocks placed at the upper vertical block limit are always well lit despite the ambient light conditions. (i.e. the top surfaces of any block place there will glow and illuminate the area around it even when it is night and there are no light sources).
This may work as intended if this irregular lighting is intended as an indication that you have reached the vertical block limit.
Confirmed on Samsung Galaxy S4 Android 4.4.2 running MCPE 0.10.5 in both creative and survival modes.
The top surface of any blocks placed at the upper vertical block limit are always well lit despite the ambient light conditions. (i.e. the top surfaces of any block place there will glow and illuminate the area around it even when it is night and there are no light sources).
This may work as intended if this irregular lighting is intended as an indication that you have reached the vertical block limit.