You can VHT anything you like from headlights, tail lights to 1/4 glass. I myself wouldn't do the headlights though. Once spray drys it's quite a prick to remove and is something you only do once. It's on or off for good. Covers offer the pitch black look and the convenience or being able to remove them at night. You won't look cool when you crash your SRT/10 into a parked car due to poor lighting. The VHT is good and lights will shine through but for the sake of the cool factor vs. 70% or less of the original shine the headlights give just isn't worth it. The rear tail lights are a different story, they are to be seen, not seeing with.
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