This is how to make an excellent excuse for driving a lag bolt into your wall, the Concrete Lightbulb Wall Hook. Functional yet sylish, it gives a nice industrial design feel wherever you mount it.

Last winter after breaking out the serious cold weather gear, I found myself fighting the coat rack next to the front door. It was, to put it bluntly, failing miserably. Tipping over, breaking off, it was a mess. I swore before the next winter I would drive some serious hooks into the wall that would handle all my heavy overcoat needs. I just haven't seen any kickass hooks yet that I liked enough to justify making serious holes in my walls.

Cut to the last few months. As mentioned in my blog ( here, here, and here) I've been playing around, trying to make a concrete lightbulb. Why? Because I find the contrast of blending a new material like concrete in an everyday shape like a lightbulb to be a great design element. So while messing around with these guys, I realized this would be a great excuse to drive lag bolts into my wall for hooks. By embedding a lag bolt into the concrete lightbulb, I could make a wall hook that was useful enough to handle anything I wanted to hang off it. Thus this project was born.

This is an entry in the Etsy/Instructables SewUseful Contest, so if you love this idea but don't want to make it yourself, not to worry! I have them for sale in my Etsy Shop. Click here to order yours today! Yes, it's an entry into a sewing contest without any sewing. Sometimes you just gotta.

Check out my other entry into the SewUseful Contest (also without sewing!) - "Big Brass Ones"
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SIRJAMES096 months ago


I need to make 1...or 3....dozen. :0)

these would make great stocking stuffers for Christmas!! Birthday presents! I can think of a million & one reasons for giving as gifts!

TY for sharing. :0)

When separating the glass from the concrete hanger, I was thinking, about why you can not use a rag to wrap the hanger/bub in?

It will stop the glass from flying, contain the glass in 1 area/spot/whatever, and when finished, just toss the rag into the trash.

Granted, you still have minute particles of glass to deal with, but as you said, a shop brush should take care of that.

caperuzita6 months ago

Nice Idea!!!

In one side I've been thinking on how to recycle soiled light bulbs but I didn't find it any easy myself.

In the other I love to hang my stuff on doors to get them more availableand keep a roomier wardrobe, but this kind of hungers aren't so easy to find, most of them fall down to the floor within the first week.

Good luck selling them!!

oldaugie6 months ago
This looked like fun so I gave it a try. unfortunately I could only find hydraulic cement which sets in about 5 minutes. to add to my woes, I got the piece all put together (bolt not straight but, all else looked good for a first try) but then dropped it the following day. the bulb came off easily but it is !missing the shininess of the one in the 'ible. Someone suggested using polishing compound which helped some but I think I'll end painting this one to cover the flaws.

After painting, I intent to drill through a porcelain fixture and insert the cast into it as if it were a real light. I wonder how many folks it'll fool! perhaps I should use space under the porcelain fixture as a safe. talk about mixing content.

For a first try not too bad though. I've now got some mortar mix and am anxious to give my next one a try.

Does anyone know how to safely dismantle a cfl? I think one of those would be fun to try as a cast.

happy casting
kculver17 months ago
Instead of a toothbrush & soapy water table salt will take that white residue right out just put a spoon full of salt in the light bulb hold ur thumb over the end & shake it it will clear it right up!
SIRJAMES098 months ago


the way we go through lightbulbs around here, I won't have to buy any...

Very nicely written, very educational,....can't wait to make a few(dozen) myself. :P

gungajin8 months ago

Absolutely great! This is one of the finest exponents of creative thinking. Reminds me on Picasso abstract paintings: so simple, everybody can do it. But only good old Pablo actually could.

thundercookie8 months ago

one question, how do i make it?

pbminecrafter8 months ago


pbminecrafter8 months ago

one question, how do i make it?

crhay8 months ago

This is a fantastic idea actually! My husband and I are trying to go with a very contemporary, modern style in our home. Having concrete lightbulbs for coat hangers would go perfectly with our theme. I will have to check first, but I think that my husband will love them too!
Cambria Rhay |

aloew8 months ago

I wonder if a different, less messy (no broken glass each time) way to do this would be to perhaps make a 2-part urethane mold of a lightbulb. You get the same accuracy, and can pull many parts from the mold over time. Also, there are good concrete mixes that will cure in under an hour with very nice results.

karcsika9229 months ago

This was my first instructables that I watched here,back in the days. Now I found it!

blending of concrete in an everyday shape like a light-bulb is genius. congrats..

challes110 months ago
I hope you don't mind...I placed a link to your site on my site... needed good instructions for hollowing out the light bulb and urs are very clear...thanks
xsmith45678911 months ago

That is a pretty awesome idea. I love to learn about little things like this that really improve on a lot of the things you would just buy in the store without thinking about it. I'll have to try that.


Xavier Smith |

x burn1 year ago
angry king1 year ago
i use your idea to make this
Adorei a ideia. Parabéns!
bluumax1 year ago
I was reading another instructable on concrete balls and remembered this one. Anyway I saw a post about using expansive cement and thought if it doesn't expand so much it trashes the metal, doubtful, it might make this a lot easier as it breaks the glass away for you. It has a nice looking finish too.

noahspurrier says: "I make cement spheres the same way! I use pure expansive cement (AKA expansion cement) with no aggregate, which creates a different look. It has no aggregate and no voids. The expansive cement has one advantage in that it actually cracks itself out of the glass mold."
qewt1 year ago
Love that sheen on the concrete!
arth2 years ago
could you use plaster of paris instead of concrete?
Honda Enoch2 years ago
I might try this with an energy bulb for that twisted look. :)
catmanduud2 years ago
its cool but whats it for
See the last photo?
blazygut2 years ago
lets just be concrete here,for a second
benny80253 years ago
I made a door handle of gypsum instead of concrete. I wanted the glass to be on the handle, but the gypsum got realy hot under the hardening, and the glass cracked. So I took the glass of and the result was better than i hoped for
Benny8025,what is gypsum? Plaster of paris? I know it's found in drywall.
Where did you buy it for your project?Thanks Elljayq
Hobby shops
Chad Baxter2 years ago
I mean, what's better than breaking glass right?!
bbondy2 years ago
Hi Sir! it's a very provocative tutorial and very nice product as a result. I tried once with colored grout as an exercise and I want to show you the result.
as you see the area around the metal circle is not connected well because i didnt clean the internal glass completely (little bit hard).
Now I have the other lamp with bolt and the wet grout in it. i cant wait to see the result by tomorrow. thank you and keep posting other tutorial. :)
bbondy bbondy2 years ago
ah i see we can post image in this comment. here it is
This is beyond awsome! May I ask what your inspiration was? i might try to do an installation using a ridiculous amount of these...maybe 200-250?
whamodyne (author)  SleepyWindows2 years ago
My inspiration was a desire to play with form and iconic shapes in ways that made people stop and think about it for a moment. That and a need for a serious hook to hang stuff on.

If you need 200+ of the wall hooks, I would be happy to supply them if you want. I still make and sell these and by now have made hundreds of them, one at a time. I could do a serious batch run if you wanted that. Please send me a note if you are interested. - Ray
Skymeat2 years ago
I just made a couple of these. Great idea! I changed the recipe a bit, which might make it safer and a bit easier.

1) I used a pair of dikes to snip off the metal button on the end of the bulb. This exposes the bare blue glass and has a dimple for a small tool.

2) A very small drill bit was used to tap against the exposed hole, creating cracks in the glass (Hold the bulb and bit in one hand and tap the bit on a concrete floor, most any other surface won't work. Just do it 20-30 times and let gravity do most the work)

3) Once the blue glass cracks use needle nose pliers to pick at the fragments, the first one is the hardest. Just get the blue glass at this point.

4) You should have the blue glass out and be looking into the sealed bulb. Insert the needle nose pliers as deep as they'll go and give a little tension on the handle till the inside breaks.

5) Use the needle nose closed to ream out the glass, you'll end up with an almost perfect hole. Just go a little at a time. Don't try and do it all at once.

6) Clean it out. Fill the bulb with a couple tsps of Morton salt. Cap the end with a thumb and shake it. Dump out the salt and repeat a few times. It will be perfectly clean and shiny.

7) Rinse and prepare concrete. The inside can still be wet, it's getting filled with concrete anyway.

8) I used off the shelf concrete mix (5000psi), but screened it to 1/8" (took out rocks larger than 1/8", so mortar mix is about the same thing) But I mixed it a bit wetter than the photos here. The consistency was about like wet oatmeal, and was pourable (Not easy to do, make it a bit too wet and add spoonfulls of powder to get there). I used a funnel to pour the mix into the bulb.

9) Wait 7 days. 3 day cure is a bit too soon to be really hard. Best if you wait 28 if you want a very hard concrete but no one will do that.

10) Break the glass off. I used a 5 gallon bucket filled with water and submerged the bulbs and tapped gently with a steel bar. I mostly brushed off the remaining glass with the leather gloves I was wearing.

11) Dry thoroughly. The concrete sucks up a lot of water. This is where I am now. I plan to let them dry for a couple weeks in a warm dry location then seal. I was left with very smooth and perfect bulbs without any bubbles and certainly concrete in the 7000psi+ range :)

I would love to see some photos of this. May I suggest you make your own instructable?
cincymikeb3 years ago
walked into the bathroom this morning and was GLAD to see a burnt out bulb !
Yaaay another wall hook !
yea, recycle
mganpate2 years ago
its very nice consept kindly share the pdf on
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