A strip of LEDs may be a simple and flexible way to add light to a project, but they don’t always look natural. There is an easy way to make them look better, though: add a diffuser. That’s what [Nate Damen] did using a 3D printer. He created a diffuser using PETG giving a standard string of LEDs a softer and more natural look that makes them look more like older light sources such as fluorescent strips or EL wire, but with the flexible colors of LEDs. The PETG material he used has a naturally somewhat cloudy look, so it acts as a diffuser without needing any extra treatment.
The diffuser that [Nate] is offering is designed to work with 7mm wide, 144 LEDs per meter LED strips, but he happily admits that it’s just a starting point: it wouldn’t be difficult to adapt the diffuser for different shapes or types of LEDs. His experiments show that the internal geometry of the diffuser has the biggest impact on the final look, because that controls how the light is reflected and spread inside the diffuser. He did this as part of his ATLTVHEAD project, a wearable display made out of the frame of an old portable TV set. By using these 3D printed diffusers on the LED strips that are mounted behind the screen, he creates something that looks much more like a TV set with a softer, more diffused look.