I've always been fascinated by optical illusions, so I decided to incorporate one into an LED light. Originally designed as a wall light with scattered light from behind, but soon decided to adapt it so that it can also be used as a table / shelf lamp.
The parts to be printed are all very easy to print without support.
As mentioned, the lamp can be mounted on a wall or used separately.
Wall Mounting
For wall mounting, 2 ways have been added:
The pitch of the screws in both cases is 100mm.
The areas of the image on the back of the Lamp Cover are raised towards the center relative to the edge. As a result, less light will be transmitted towards the center due to shadow effect. This was deliberately chosen!
To make the translucent image light up more and also to improve the shadow effect towards the center, 2 caps have been added that you can click on the back of the Lamp Cover. The light emitted to the wall or room behind (when free-standing) is thus greatly reduced. If you want to use them, you need to print the Cap Back twice.
* tip: if you print a different color Cap Back, the appearance of the light will change from the edge towards the center to the color used. The outer edge remains white due to the direct light of the LED strip. You can simply see this effect when turning on the licht without back walls and place you hand behind the lampshade. The color to the center blends to light red due to the overall red reflection of your hand.
Free Standing
For free-standing use, a narrow stand in 3 parts has been added, which can easily be pushed together.
Place the Stand Coupling Piece on the used Wall Mount. I deliberately opted for a free fit so that you can still switch between the mounting methods.
Slide both Stand Bars into the designated slots. Because they are both at a slight angle, there is a difference between the left and right on the resting position. Both are labeled for easy identification.
All parts can be printed without support.
You can use your own favorite settings for all parts with the exception of the Lamp Cover.
Printing the Lamp Cover
The lamp cover is a 2 color print (switch on indicated layers)! The contrast between these 2 colors determines the sharpness of the projected image. Advice is white with black, but of course other color combinations can also be chosen. The light color must let the light through well. Keep in mind that if you decide to use a (partially) transparent print material, the lamp will also "leak" more light to the sides.
The design is based on the use of a layer thickness of 0.2mm (also for the 1st layer!).
The first 3 layers (0.6mm) form the front layer of the lamp and hide the image when the light is off. (White printed)
So, change color on the layer from 0.8mm (to Black)
Then the image follows. This one has multiple levels, but the highest layer is at 1.8mm.
So, switch color on the 2mm layer (back to White again).
There are no more color changes after this.
You can choose the infill yourself (min. 15%). The higher the infill you choose, the less light will shine through the sides of the oval border. I printed at 20%, but would recommend a higher percentage.
Any LED strip can be used, but I would advise using a so-called COB LED strip. With this, the light is emitted very evenly. I used an FCOB Ledstrip as you can see below. These are available through aliexpress or amazon at a favorable price.
I bought it here: [LINK] (Just for info, i'm not advertising. You can order these from multiple sites.)
The LED strip is glued into the recessed edge on the inside of the lamp.
The recessed edge is for a 10mm wide LED strip, but narrower ones can also be used. The total length required is approximately 550mm, but I recommend that you first try the length on the inside before dividing them where possible, to avoid a strip that is too short.
I would recommend securing the end where the connecting wires are mounted or soldered with a drop of instant glue to prevent the adhesive strip from loosening due to sagging of the wiring.
The LED strip is powered with a simple 12V power supply.
I bought it here: [LINK] (Just for info, i'm not advertising. You can order these from multiple sites.)
Of course you can add a controller to the LED strip. These can also be found in abundance on Aliexpress or Amazon. I used an RF Led Controller with dimming function as you can see below.
I bought it here: [LINK] (Just for info, i'm not advertising. You can order these from multiple sites.)
With the dimming function at 100%/50%/25% it looks like this (with white Back Caps):
The author marked this model as their own original creation.