Am Simon from Nairobi. I have a problem with my 2003 Nissan Advan/Wingroad in that the headlights are 55/60 watts and they appear too dim especially at night in poorly lit roads or in bad weather. I talked to a friend who told me I can upgrade the bulb to 90/100 for more light. How can I upgrade the light safely without overloading the wiring? Kindly help.