Thank you to everyone who took the time to reply to my post. I like the one about the HID bulbs but have no technical knowledege. I checked out the website but couldn't find any prices.

I've been away on the bike camping this weekend and used the new Yamaha panniers. Unfortunately the key broke in the lock and rendered them useless. Fortunately, the panniers weren't on the bike and I was able to send them home in a friends car.

Consequently my headlamp mods have taken a back seat. I will write more on the panniers in the luggage section over the next day or so.

Many thanks xt660zrider