The H4 bulbs that are going to be fitted are plug and play.High beam is rated at 30w,low beam at 20w[led rating].The type of bulb I am using is a Pair H4 H/L CREE LED 60W 5600LM 6500K Auto Car LED Headlight Day Headlamp Bulb.They come with an adapter connector to go between the original plug and the bulb.They use a external heat sink instead of a fan arrangement,more reliable.The base mounting plate looks like it is screwed on so removal to fit original rubber seal cap may be possible,than refit mount plate which will sealed the lamp against moisture etc.These bulbs should arrive this week according to the seller via Aust post registered mail/tracking.I will keep you updated to the outcome of this modification/upgrade.image.