Here's a 5 LED bar to illuminate your eTap2hws from Poundland.
Cut the plug off,pull the waggly chrome tube off the light itself and the wires will pull up the tube.
It is a 5 volt device so a resistor will be required or run 2 of them in series.
http://www.poundland.co.uk/product-range/a-z/usb-plug-in-5-led-light/