This project is quick and easy to put together, yet really impressive. Even more so in person than in the video. With this flashlight conversion I was lighting up trees as bright as day at 300 yards and further. By adjusting the flashlight's position on the block the light can be made to focus to either a narrow beam for maximum range, or a softer spot to provide more even lighting.

The makeshift bat signal shown later in the video was created as an afterthought to the main project and it really turned out great. That could be a fun one to use around town.


  • Flashlight (I used a ThruNite TN12)
  • 2x2 Inch Planks (Approximately 30 inches in length for the base, but the focal distance can vary depending on the lens. The second block should be as long as the flashlight used)
  • Large Magnifying Glass (Mine was 5 inches in diameter)
  • Velcro Straps (Or large rubber bands)


  • Black Spray Paint
  • Tripod
  • Nail
  • Craft Foam/Cardboard (For cutting shapes to project in the beam)
<p>Very cool! 36mm focal length, using a bicycle light. Very powerful...fun stuff, thanks!</p>
<p>it also works with a phone flashlight if you don't have a handheld flashlight </p>
<p>Thanks for fixing the video</p>
Now you have to take it one step further and project the bat signal in the night sky.
<p>Nice. I will probably make this sometime with the kids. The neighbors are going to love it.... ha ha ha!</p>
<p>Hah! </p>
My son is going to love this can't wait to try this
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About This Instructable


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Bio: I like turning boring things into awesome things! Usually on video.
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