Possible Clues:

• Night driving need, and what can go with the starts of the answers to starred clues
• One in the pits wears this halo?
• Worn pit beam used for navigating in the dark
• One offering powerful views on traffic at night
• Halo for a late motorist?
• Being so bright does not make one topheavy
• Announcement left in most intense period that clarifies the way forward
• Bright lamp on front of car etc
• Not having much weight on top it may be dipped
• Given shiner, giddy?