The dreaded Walmart is the place to start. While you are there check out the long life rechargeable batteries, and save even more money.
Emergency flashlights stored in cars should be switched over to LEDs and Lithium batteries so they will be there and working when needed. Lithium batteries are the only ones that can take the heat and work when needed.
The lowly flashlight can be your most important emergency tool, make sure it works for you. I am partial to Maglites, cheap and the work, the new LED versions are the best.
Hey, I own no stake in any of this stuff, except for being in the path of hurricanes year after year where the power can go off for days or weeks at a time.
LEd bulbs for the home are still a little too expensive, but the claims of 100,000 hour life and large energy savings are real. Most cities around here are converted to LED stop lamps and they claim the costs saved because of the cost to roll a truck to replace a bulb are worth it. Big fan of LED bulbs here, just not the price :<)
My little single-AA flashlight will run about 3 days continually on. ...and LED's aren't likely to break if dropped - the weakest point is usually the solder point or the traces on the ckt board, which are both a lot sturdier than an incandescent's filament.