I have installed genuine Philips Diamond Vision 5000K in my mehran. The output quality is really awesome. I feel the difference between genuine and crap thing. If you want to see the result pls visit this thread:
Installed Philips Diamond Vision 5000k Genuine
Go for Phillips X-Treme bulbs. Much much much better than HIDs in alto.
from where can i buy these H4 in karachi?
Im Using a Halogen/HID ,So i can easily switch to halogen on medium beam.Suggest the same ^^