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Each week, we highlight a design or product innovation that you might not have heard about yet. Many of them come through your submissions ( here's the form), but this week's idea came to us from our NPR Two-Way blogger, Eyder Peralta, who thought this was pretty cool. We did, too.

With this dual-purpose device, you won't have to fumble around for a flashlight for trick-or-treating or the next time the power goes out. The Bulb Flashlight is a low-heat, rechargeable LED bulb that doubles as a handheld flashlight.

The bulb charges when screwed into a light fixture but works as a torch for up to four hours without a battery. Extend the handle after screwing off the bulb and you have an instant source of portable light.

The product is eco-friendly — using just six watts of power to produce light equivalent to a 40W incandescent bulb. But it's not cheap. The New York Museum of Modern Art's online store is selling it for $45, with 10 percent off for members.

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