High efficiency lantern with flasher and dimmer by LM358You can add this high-efficiency dimming and flashing circuit to an existing battery-powered lantern or flashlight or to a custom design. For the car it makes a great lamp for changing a flat tire, back seat reading or emergency engine work. The flasher mode is useful for warning other drivers of your troubles and it may be adjusted to have a very short flash duration for long-term use as when the car must be left on the shoulder overnight.

High efficiency lantern with flasher and dimmer by LM358
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High efficiency lantern with flasher and dimmer by LM358