Kobus, thanks for posting and directing me here.
The system was initially developed for older Land Cruisers (60, 80 and 70 series), but will work for virtually any make/model where the OEM wiring is not up to the task. Newer Cruisers, Hiluxes, etc have suitable wiring and can only benefit from better globes
It involves a controller (relay box), new loom and, if required replacement headlamps and better globes. The design is plug and play - unplug your old loom, fit the new one; connect box to battery and Bob's your aunty. There is no cutting/splicing involved and OEM wiring remains as OEM
On a typical installation (controller, headlamps and globes), you can expect about a 300% improvement in light output on both high and low beams. PLEASE NOTE that I have not tested any Hilux wiring to date, but I know my old 2.4 would certainly have benefitted
To date I have mostly been using Osram NightBreakers and now the NightBreaker Plus which "promises" longer life (to be proven). I also have a range of Ring Automotive XenonMax globes which provide the same light output as the Osram but "promises" even longer life.
The controller also makes provision for spots and fogs. These can be made to switch independently or on/off with the high and low beams respectively.
Cost of the controller plus loom for single headlamp vehicles is R1 160 while twin headlamp vehicles is R1 285. Installation is R400/R650 respectively, but if you can turn a screwdriver and know that the red wire is positive, then you can DIY
Replacement headlamp units are dependent on model
Note that I would like to test the various Hiluxes before I make any promises
Any volunteers for non invasive surgery?
And that rimes nogal 
