Kokua Line: No colored coverings or grilles allowed on vehicle headlights

Question: Are halogen headlights and light-blue covers for the headlights legal? When driving at night, my classmates and I feel they are blinding to our eyes. The people who put tinted blue covers over the headlights are also trying to make the car look like police cars.
Question: Can you tell me where I can properly dispose of used mercury-filled light bulbs or CFLs?

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