Stage-inspired LED Spotlight

by Depronized, published

Stage-inspired LED Spotlight by Depronized Jan 20, 2017


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IMPORTANT!! turn the parts as shown in the picture from Cura (yellow parts) before printing! That way you don't need any supports.

Update 16/4/2017
Chad_R made an addon to secure the LED in the cabinet:

I wanted spotlights for my 3D printer cabinet so I decided to draw stage-like spotlights in miniature. I use LED's from Hobbyking and run them on roughly 130mA without overheating. https://hobbyking.com/en_us/super-bright-3watt-white-led-lamp-with-aluminium-heatsink.html

It is designed to be printed with the parts oriented as in the picture. I used Cura for slicing, and 0,2mm layer height turned out better than 0,1mm on my Prusa mk2 at 60mm printing speed, black PLA.

Note that the front and rear piece are purposely not press-fit as printers have different precision and it's easer to add a bit of for example melt glue to make them fit tight.

The cables are fed through the hole in the back, you need to use a knife to remove some material from the edges where the LED rests in order to keep the LED level.

I used heat glue for my LED's as I knew I wasn't going to push them very hard.
The holder uses M3 screws and because the holes go through the walls it can handle screws up to at least 18mm.

The front comes in two lengths depending on if you want a very narrow beam or a wide beam. I uses one of each in my printer cabinet, the short one illuminates the whole build plate from above, while the long narrow one focuses on the middle.

The plate in the front is primarily for looks but it can be used to hold colored plastic or you can design your own plate to shape the beam, for example if you want a square beam.

You can enhance the light output by for example using a focusing lens in front of the LED, and I presume coating the inside of the front piece with some highly reflective surface would increase the light output, but it would also widen the beam. Have fun!

Update 02-02-2017 - Added a mount that can be pushed down in flowerpots or in the ground.

Print Settings


Prusa i3 mk2









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its like almost a source 4 but not quite

You found my source of inspiration. :) Allthoug it's not meant to be a scale model, it's just inspired by that one because it was the first thing that popped up in my google picture search when I looked for inspiration.

Thanks! :)

Mar 15, 2017 - Modified Mar 15, 2017

Absolutly love this one!
Will print a few to light my Prusa i3 MK2.
Great work!

Glad you like it, I made it for the exact same purpose! :)

Great work. Any possibility of seeing it lit?

Jan 26, 2017 - Modified Jan 26, 2017
Depronized - in reply to RB-horizon

Hi, thanks :) I added a picture of it installed in my printer cabinet. It's really hard to take pictures of it lit as the contrast is so huge being a black piece against bright light. Worth noting that in the cabinet there's also another spot installed on the not visible side, pointing towards the print bed. In order to get this amount of light from the spot, I used aluminium foil on the inside of the spot. The only downside is that the beam gets a lot wider as you can see, so it's a trade off. Adding a lens would make it possible to focus all the light in a narrow beam, I haven't tried that yet. I would be glad if anyone could find and post a link to a suitable lens. :)

Nice indeed.

I think a lens would be counterproductive though, perhaps trying to salvage/scavenge reflectors from old or cheap dollar store flashlights could do the trick (possibly for lenses too if you're set on using them).

Looks good anyway.

The thing is that the LED is already so much focused forward from the start, where a old-style bulb is shining all over the place. A reflector is only taking care of light that shins sideways or just slightly forward, all the rest that shins on the forward walls of the spotlight tube would not be taken care of. A lens however would take care of that if it has the right design of course.

Glad you liked it, I will develop this concept further! :)

I may print some and see how they scale up. I work concerts from time to time (or at least did before my knees gave out) and I've always liked the look of the PARcans.

There's also always the solution of designing barn doors for it as is sometimes used on the real ones.

Nice Job, looks really nice
Thanks for sharing