There is a reason why you use the brighter lights when you drive. Normally the people with poor vision find it useful but not all drivers should be doing that considering that it is a form of disrespect when you are passing other vehicles with glaring headlights.
Normally, these headlights are only flashed in instances like:
1. Making a turn to warn incoming vehicles
2. Overtaking a car in front
3. Warning cars in an intersection that you will be passing
4. Other warnings such as car trouble or perhaps emergencies
In most of these cases, the use of the bright option is justifiable but some just don’t know it. It does make the road brighter especially at night but unless you are driving all by your lonesome on the road, it would be best not to use them unless really necessary.
If you will notice, some drivers modify the type of lights, depending on their need. Some use the higher watt lights, sometimes over 90/100 while others go as far as changing the color from traditional incandescent colors to amber lights that are good when you are in foggy roads.
There are some states that forbid the use of amber or yellow lights due to the strain it can have on opposing cars in the opposite lanes. It can even cause accidents if not used properly and hence has become a reason why some countries ban them.
Use your car headlights wisely. It can make a difference between road courtesy and disaster.