As posted in another thread:
For convenience if you are not ready to build your own firmware, there is a standard LEDE image with wifi enabled and luci installed on our web site here:
http://blue-wave.net/firmware/lede170104/lede-17.01.4-ar71xx-generic-gl-ar300mLite-squashfs-sysupgrade.bin
This is NOT a GL-iNet release but one I have made and is straight from the standard LEDE ImageBuilder, with wifi enabled and nothing else but luci installed.
PS LEDE uses 192.168.1.1 for the LAN interface by default. This will most likely clash with the router you connect your Lite to. If so use 192.168.8.1 instead.
If anyone wonders why GL-iNet firmware uses 192.168.8.1, then this is the answer 