ᐅ Attaching a Solar Light to a Stone Post – Looking for Ideas

Created on: 17 Mar 2021 21:55
T
Tarnari
Hello dear forum members,

I could use some advice on the best way to attach a solar light to a stone post that holds a house number at the beginning of our driveway from the street. The reason is that the number is made of stainless steel and is basically invisible from the street in the dark when attached to the stone. We do have one on the house as well, but the driveway is about 30m (100 feet) long.

The problem object looks like this:


Walkway with gray concrete post next to metal fence; large gray stain on the post.


This is how the light should/must be mounted on it.


A hand opens metal gate on concrete post; visible sign saying 'Video monitored'.


Here are some more pictures of the light itself.


An LED light panel lying on a wooden table; wine glass on the right, small parts scattered on the left.


This is the bracket, note the mounting holes.


Close-up: hand holding black plastic piece with two round indentations; table in the background.


I actually want to anchor the light with screws. However, I’m worried that the stone might chip because I only have about 1.3cm (0.5 inches) of clearance to the edge of the corner. I first tried silicone, as seen in the first photo, but it didn’t hold the light at all.

I would now be interested in your assessment or ideas:
The material is similar to paving stones or a curbstone. Should I be concerned that it will chip? If so, how should I proceed? Is there a construction adhesive suitable for this? The mounting bracket also does not offer a broad surface for attachment, only these narrow grooves. I’m unsure whether any adhesive would bond securely there. In addition, I would prefer to be able to remove it later without leaving severe residue. The silicone stains in the first picture are already annoying me.
A
apokolok
17 Mar 2021 23:59
Just drill it, it won't chip off, even with hammer action.
But if the material is really like paving stone or curbstone and it takes you 5 minutes to make a hole, you simply need a good drill. In such material, a decent hammer drill works like butter.
Does the lamp run on solar power? There doesn't seem to be any electricity available.
I see this more as a gimmick anyway; the unit won’t provide continuous lighting.
Tarnari18 Mar 2021 00:07
apokolok schrieb:

Just drill—it won’t chip off, not even with percussion.
But if the material is really like paving stones / curbstones and it takes you 5 minutes to make a hole, you simply need a suitable drill. For that kind of material, a decent hammer drill works like butter.
Does the lamp run on solar power? Apparently, there’s no electricity available.
I see it as a gadget anyway; it won’t provide continuous lighting.

Yes, it does work well. We’ve already tested it. In low light, it switches to a dim mode, and when there’s movement, it goes to bright light. The battery lasts a very long time. It will definitely work.
What do you consider a suitable drill?

Edit: There is electricity on the other side of the post—a KNX motion sensor is installed there to control the lighting for the access path.
Nida35a18 Mar 2021 00:32
Tarnari schrieb:

What do you consider a reliable drill?
Hilti quality,
Single drill bit 10€, set 30€.
If you want to fix a lamp to a concrete ceiling and alternating metal shavings and stone dust come out, and you need 5–10 seconds per hole
A
apokolok
18 Mar 2021 00:36
Tarnari schrieb:

What do you consider a suitable drill?
What are you using?
Actually, any hammer drill should get through that quite easily.
If you use a cordless drill, it needs to be a more powerful one; those cordless drivers with a drilling function are more for very soft materials.
Tarnari schrieb:

Edit: Power is already available; on the other side of the post, there is a KNX motion sensor for the pathway lighting.
That’s perfect then. Just drill through the entire post and you have power.
I would install something very compact, so you don’t have any issues later.
Look up Lucande Lengo. It’s a bit too wide, but that’s the kind of thing I mean.
rick201821 Mar 2021 06:20
Use the right drill bit (e.g., Hilti), drill without hammer function, and then continue slowly. Of course, you can drill the hole quickly, but I wouldn’t take the risk. Alternatively, there are also construction adhesives (over 300kg/10cm² (over 427 lbs/in²)) that hold very well. Actually, it is enough to make just one hole in the center. Then seal or bond it with silicone, PU foam, or construction adhesive.