You are right Dawg, a £20 torch would probably work but you would have to close all the curtains, turn off all the lights and work closer to the carpet.
Bit like comparing an Aquarius Pro valet with let's say an Alltec express... Both do the same job but one just does it better due to the design and the components used...
I have experimented with alternative components and the quality just isn't good, contact springs breaking off the back of the LED module, batteries refusing to charge, chargers not charging batteries, poor quality reflectors resulting in a poor beam pattern... The ultra fire torch body has been copied to death and most of what you see on eBay are all fakes.