What ion is most closely associated with bases? ammonium hydroxide carbonate hydrogen

Answer is: hydroxide.

According to  Bronsted-Lowry theory acid are donor of protons and bases are acceptors of protons (the hydrogen cation or H⁺).  

The hydroxide anion (OH⁻) is Bronsted base and it can accept proton and become conjugate acid H₂O.

Balance chemical reaction with acid:  

OH⁻(aq) + H⁺(aq) ⇄ H₂O(l).

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.