Bundled wiring - you only run a single cable between each location.
Design load of 200W per bulb, per filament.
Individual relays and fuses for each circuit (relays provided, fuses you provide. I don't know what bulbs you're going to run - but there will be a chart for you to refer to.)
Sealed connections - as waterproof as I can make it.
Uses ATC/ATO fuses, just like the rest of your XJ.
Uses DIN Bosch/Hella relays, just like the rest of your XJ.
Designed for the XJ - not a "generic" unit.
"Plug And Play" installation - no splicing of signal wires. There will be a male pigtail that plugs into the OEM harness for the right headlamp, and that's how it gets its signals.
Removes the load from the headlamp switch, reducing chances of burnout.
That's all I can think of for the moment - I'm up to my neck in Dana BoM numbers right now, and planning how to cut up that 89 I've got in the garage. I'll be happy to answer any other questions, tho...
5-90