You might also want to check the voltage at the back of the headlight connectors. With the higher wattage high beams, you may not be getting full voltage (or brightness) with the stock wires (I know I didn't with the 55/100s):

[Linked Image]

http://www.4crawler.com/4x4/CheapTricks/Headlights.shtml#TryBeforeYouBuy