The ballasts will need to be adapted to the existing wiring harness, just like the extra relays in case of 100/90 bulbs.HID kits are expensive.
The more light bulbs are of stock wattage and will have no adverse effects on the reflectors.They run much cooler than 100/90 bulbs as well.100/90 will cause discoloration of the plastic lens of the headlamps over time.