Picture of Turn a Flashlight Beam into a Far Reaching Spotlight

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)
paul dito made it!11 months ago

Very cool! 36mm focal length, using a bicycle light. Very powerful...fun stuff, thanks!

DSC_0002 (480x319).jpg
dcada12 months ago

it also works with a phone flashlight if you don't have a handheld flashlight

VentureScout12 months ago

Thanks for fixing the video

Giu5liano1 year ago
Now you have to take it one step further and project the bat signal in the night sky.
seamster1 year ago

Nice. I will probably make this sometime with the kids. The neighbors are going to love it.... ha ha ha!


Thatdan1 year ago
My son is going to love this can't wait to try this
Can't see a video?
NightHawkInLight (author)  walkernstan1 year ago
If you're on mobile you may not be able to see it because of issues Instructables has been having. If not it might be because the video has not yet been made public on my YouTube channel (it will be public in about 6 hours).