Just like incandescent light bulbs... 
Thanks for throwing salt on my wound with THAT one Haird! lol. I always kept a clear 150 watt incandescent bulb in my dartboard light in the garage. Worked awesome for throwing darts or any project I would be working on at the time that needed some extra light. Those bulbs were pretty cheap so I always kept a couple spares on-hand.
Well, my last spare blew on me the other day. I go to Home Depot and NOT ONE to be found in the whole aisle of bulbs! A complete joke what this world is turning into .... What used to cost me I think a couple bucks at most turned into 10 bucks for it's replacement .... a stupid LED 150 watt FLOODLIGHT. I'm still afraid to open it in fear of how much more pissed-off I will get when I find out I'll be getting shafted twice .... I was so pissed!
Don't get me started on the two current 100 w CFL bulbs in my garage ceiling now over a year old which are also no longer made! .... and the fluorescent bulb that blew in the hood over our stove that had to be replaced with a LED bulb that DID NOT work!