Possible Clues:

• Type of car headlight
• Egg producer keeping a record of iodine, say
• Gloria has information on a non-metallic element
• Virtue-signaller supported by low-down element
• Kind of lamp or headlight
• Fluorine or chlorine
• I for one ring back, say, before noon
• Sort of element requiring information on aura
• Like some lights
• Element in the penultimate column of the periodic table