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If those are the headlights I sold you they definitely take H7 bulbs. Single filament, they use a shutter to switch between high/low.
The bulbs that I sent you installed in them are (rather expensive) 65W H7. Stock Mini halogen headlights are 65W, most H7 bulbs are 55W.
65W H7 bulbs give a bit more light but won't melt the wiring or blind other drivers. I suspect those H7s will give you better light than LEDs and would suggest just using them.
Those projector headlights, when aimed properly, are infinitely better than the terrible OEM halogens.