But according to the math, I could buy one double-life bulb for $3.49 or two regular bulbs for $2.98. So you'd be paying 51 cents for the convenience of not taking the time to replace a burned-out regular bulb with another regular bulb. What would you do?
I bought two of the regular bulbs. For all I know, the appliance bulb in my refrigerator might burn out next week.