If You want the light to be brighter. You neeed to change the Bulb. The have many kinds in terms of brighness. The original ones brightness is around 4.3K or 4.5K brighness the allowed brightness is 6k and below it is written on the box. For malaysia 5.3k is sufficient. Some cars with higher specs come with Xenon HID. your other option is Halogen bulb. My Oris HID are about 4.5k I changed my head lamps to Ori Japan specs with Xenon HID 6k. No problem with brightness. Maybe your adjusters are broken and you lights are drooping.
Maybe you can take a picture of the light shining on the wall. Just park your car about 25 ft away from the way and turn on your HID. From the light profile, maybe we can figure out your problem.