Is argon in the family of halogen?
No. Argon is a noble gas.
The major difference between an incandescent bulb and a halogen bulb is the gases that each produces within its glass bulb. Incandescent bulbs fill with a mixture of 93 percent argon and seven percent nitrogen, while halogen bulbs adds a halogen gas, such as iodine or bromine. Halogen bulbs are more efficient compared to incandescent bulbs.