The art of roasting a bird with a flashlight requires much more than the typical yellow shiner found at your parent's house; in fact, you need something more than a hundred times more powerful.
While we don't know exactly how many exact lumens -- a standard of measurement used for lighting (where 1 lumen usually equals the power of one candle) -- you need accomplish the zany task, we do know through an informative YouTube video that cooking a turkey with a flashlight is possible.
Kipkay -- perhaps best described as the McGyver of the Internet -- puts six Wicked Laser Torch flashlights (with an astonishing power of 4,100 lumens each) in a circle around a turkey, and after several hours a large portion of the bird appears golden brown with a perfect internal temperature of 177 Fahrenheit.
Just one of these blinding Torch flashlights costs $199, and only lasts about 5-10 minutes before needing a recharge. In Kipkay's video, we didn't spot any external power sources connected to the flashlights, but on the other hand we don't question the raw power of such a bright light after seeing this other video.