You know, a company here sells a light that is a GE landing light sealed beam on a casing that is pretty similar to KC daylighters made of plastic. These are 100W halogen lights. They're extremely cheap, have an awesome pattern and are really bright.
Aircraft landing lights are a different breed (I've work corporate aviation for 30+ years)
While they are bright (depending on bulb) if you look in the GE catalog, some only have a 'life' of 25 hours.
They are used for approach only and as soon as the plane has landed they are switched off and taxi lights are switched on.
They also general a crazy amount of heat. On our aircraft (a Falcon 50) if they are left on they will melt/distort the clear fairing in front of them
While they can hold up to the shock of landing
(what, all pilots don't make butter smooth landings?) that is one shock (or 2-3) not the continues pounding of off-road driving.
Landing lights are not the way to go.
BTW- most of the 'real good ones' light wise are 24vdc