Concrete Lightbulb Wall Hook

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

challes11 month 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
xsmith4567892 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 burn4 months ago
angry king7 months ago
i use your idea to make this
Tania Schier7 months ago
Adorei a ideia. Parabéns!
bluumax10 months 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."
avisser1 year ago
Love that sheen on the concrete!
arth1 year ago
could you use plaster of paris instead of concrete?
I might try this with an energy bulb for that twisted look. :)
catmanduud1 year ago
its cool but whats it for
See the last photo?
blazygut1 year ago
lets just be concrete here,for a second
benny80252 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
I mean, what's better than breaking glass right?!
bbondy1 year 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 bbondy1 year 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)  SleepyWindows1 year 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
Skymeat1 year 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?
cincymikeb2 years ago
walked into the bathroom this morning and was GLAD to see a burnt out bulb !
Yaaay another wall hook !
yea, recycle
mganpate1 year ago
its very nice consept kindly share the pdf on
stealthop1 year ago
im fairly shocked you broke the glass off to be honest
stealthop1 year ago
you can dump some rice into the bulb and give it a shake. it will clear the white powder in no time without water .
shazni1 year ago
hi...i've collected some bulbs and then i tried to hollow it...i tried..i tried and TRIED!!! the black thing doesn't come out! i even tried to drill a hole...nothing is happening!!! please tell me what i am doing wrong? the silver led just came out when i used a dremel to cut off ...but the black thing is not i use fire?? i'm scared if the bulb will burst in my face
serious winter gear? for me that means wearing socks with my sandals...loved the intructable...nice work
Here in sa
Winter entails :
Sleeveless t shirts
short pants
and crocs
Sadly, that's what my winter hase been like this year--and I live in Colorado. It's a sorry state of affairs when I can wear a short sleeve shirt in Febuary. >_<
sorry to hear that...I am looking at 75 degree days but 40 degree nights..could use some the tourists away and make beach parking easier..Perhaps you will get the snow you need
azharz2 years ago
Nice Instructable, and I have an idea for you why not mix it with poster colour so the concrete bulb have shiny colour.
Irock1482 years ago
closet door handles
asteidl2 years ago
Haven't got solid plans for my afore-mentioned home-made tool idea, but I do have some ideas, revolving around and a big nail, a battery pack, and a few zip-ties.
asteidl2 years ago
A miniature concrete vibrator would be perfect for this project, I've seen enough concrete work in construction, I may try to make one, for this and similar projects. Concrete seems to be a great medium for functional art, being that it's cheap, strong, and durable, and can take a decent finish.
 You could also just use clear unfinished bulbs. Great ible. TY.

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