leaving headlights on all the time

I have a stupid question.I have a 2013 Tacoma, and, I was thinking about leaving my headlights on all the time, like some here have suggested. I was just wondering though. If I leave my headlights on all the time approximately how long before my bulbs burn out?(including tailights and fogs)A year? 6 months? Less? Longer? What do you think?

 

I once had 10 years on my 4runner stock front headlight bulbs

aftermarkets lasted 2 or 3 no matter how careful I was installing them

 

I have 47,000 miles on my 2011 and I drive with the headlights on about 90% of the time, if that tells you anything

 

i run 100% of the time with the headlights on. never turn them off. have only replaced the bulbs once. 2005 truck, bought new, 115,000 km