When placing a large aquarium inside a wall recess or alcove bump-out, lighting can be a fun challenge. While an overhead hanging light provides great main illumination from above, the recessed space behind the glass can still feel dark or highlight ugly filter tubes and cords against the back wall.
To give the aquascape real visual depth and a soft, backlit gradient, I combined my overhead hanging light with a quick DIY backdrop setup using two budget finds: frosted window cling ($6.99 on Amazon) and flexible LED strip lights ($17 at Target).
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| The backside of my aquarium before turning it around to plug it in. |
Here is a shot of the back of my aquarium before turning it around to plug it in, followed by how I put it all together and why it works so well in a recessed space:
The Setup & Materials
- Frosted Window Cling: Static-cling, removable opaque film.
- LED Strip Lights: Two flexible color-changing LED strips.
- Overhead Light Fixture: Upcycled hood mounted above the tank.
- Mounting Hardware: Two 3M heavy-duty wall hooks & black metal hanging plant chains.
- Glossy White Spray Paint & Primer: To maximize reflectivity inside the hood.
- Extension Cord: Small cord to reach the lower outlet inside the cabinet.
- Basic Application Tools: Spray bottle (water + drop of dish soap), squeegee or credit card, utility knife and scissors, painter's tape.
Step-by-Step Installation
1. Prepping and Applying the Frosted Cling
Before pushing the tank completely into the wall nook, thoroughly clean the back glass pane. Spray a generous mist of soapy water across the glass, roll out the frosted cling, and smooth it into place. Squeegee out all the air bubbles and water working from the center outward, then trim the edges flush with a sharp utility knife. You could take it a step further and cut a few small strips of clear packing tape to secure it to the outside of the tank if you're worried about the cling possibly falling off in the future.
2. Mounting the Bottom LED Strip
Attach the Target LED strip flat along the aquarium's bottom edge. I had enough space to run two strip lines to add extra light output, and then I cut off any remaining excess strip I didn't need.
Pro Tip on Tank Placement: Pay attention to the distance between the backlights at the base of your tank and the wall behind it. If the tank sits too far from the wall, you get less light reflecting upward, whereas placing the tank closer to the wall creates more intense, concentrated light with a dramatic gradient effect scaling up the glass.
3. Refurbishing, Wiring & Hanging the Overhead Light
Instead of buying a brand-new overhead fixture, I decided to upcycle an old one I already had. The original bulb had burnt out and a replacement wasn't possible, so I gave it a complete DIY overhaul:
- Gutting & Prepping: I removed the old internal bulb components, cut off the old cord, and taped off the outer edges to prep for paint.
- Maximizing Reflectivity: I sprayed the inside housing with a glossy white spray paint and primer combo. Adding that bright, reflective inner lining makes a massive difference—it maximizes light output across the top of the tank, which is especially key when using color-changing lights.
- Adding the Overhead Strip: I mounted my second flexible Target LED strip inside the freshly painted housing. Since the strip's power cord wasn't quite long enough to reach down behind the tank and into the cabinet, I used a small extension cord to bridge the gap cleanly.
- Hanging the Fixture: To mount it cleanly above the tank, I secured two 3M wall hooks to the underside of shelf that's sitting directly above the aquarium. Then, I attached black metal hanging plant chains to the hooks and looped them securely under each side of the light hood to hold it level over the aquarium. The great thing about this setup is how easy it is to remove the light if needed, plus I can easily raise or lower the light based on my needs just by adjusting the chain length (I usually keep it set high enough so I can comfortably open the tank lids).
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| The light setup with dark-blue up top and light-blue in the back. |
Why This Dual-Light Setup Works for Recessed Walls
- Fills the Wall Alcove: Recessed wall nooks naturally trap shadows behind fish tanks. Adding the bottom backlight brightens up the entire alcove, making the tank look like a seamless, custom feature wall.
- Conceals Cords & Equipment: The frosted finish blurs filter tubes, heater cords, and wall outlets behind the tank while letting soft, ambient light shine through.
- Creates Layered Visual Depth: The overhead light highlights your plants, substrate, and hardscape from above, while the bottom-up backlight adds dynamic contrast to the back wall—creating an awesome, customizable sunset gradient effect to the background of the aquarium.
