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blown bulb
In photography, exposure is the amount of light per unit area reaching a frame of photographic film or the surface of an electronic image sensor. It is determined by shutter speed, lens F-number, and scene luminance. Exposure is measured in units of lux-seconds (symbol lx ⋅ s), and can be computed from exposure value (EV) and scene luminance in a specified region.
An "exposure" is a single shutter cycle. For example, a long exposure refers to a single, long shutter cycle to gather enough dim light, whereas a multiple exposure involves a series of shutter cycles, effectively layering a series of photographs in one image. The accumulated photometric exposure (Hv) is the same so long as the total exposure time is the same.
A few nights ago, my front right indicator bulb seems to have blown. I was indicating to turn right, and a car was approaching with no lights on (5pm, already nearly full dark). So I flashed my headlights several times to warn them, and then a few dashboard warning lights came on.
Now every time...
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