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Portable wall to reduce light trespass

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#1 SpaceNetworks

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Posted 29 July 2019 - 04:09 PM

I made a portable wall to block light from the neighborhood (got the idea from another CN member).  It works well at reducing light trespass.  These photos are from my backyard observation pad in Bortle 7 suburban Los Angeles.  To see a low-angle, widefield photo of my setup and the night sky, go here.

 

DSC05744.jpg

 

DSC05745.jpg

 


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#2 John Fitzgerald

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Posted 29 July 2019 - 04:25 PM

I made one like that before I got the little dome, except mine spanned about 340 degrees and consisted of seven panels, all one inch PVC framed, and covered with tarps that were silver colored on the outside, and brown on the inside.  I could set it up, using carpenter's clamps the join the side pipes, in about 10 minutes or so.  The opening faced my back door.


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#3 TikiTom

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Posted 29 July 2019 - 05:09 PM

I made one like that before I got the little dome, except mine spanned about 340 degrees and consisted of seven panels, all one inch PVC framed, and covered with tarps that were silver colored on the outside, and brown on the inside.  I could set it up, using carpenter's clamps the join the side pipes, in about 10 minutes or so.  The opening faced my back door.

Got photos?

I'd like to have something like that.

 

Besides, It didn't happen if you don't have pics....  lol.gif


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#4 John Fitzgerald

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Posted 29 July 2019 - 05:15 PM

Got photos?

I'd like to have something like that.

 

Besides, It didn't happen if you don't have pics....  lol.gif

I posted it on here many years ago.  It's in the archives.  I'll try to find it, and post a link.  After I got the dome in 2009, I disassembled the panels.

 

Post #9 in this thread: https://www.cloudyni...s-wo-being-one/


Edited by John Fitzgerald, 29 July 2019 - 05:38 PM.

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#5 TikiTom

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Posted 29 July 2019 - 06:07 PM

I posted it on here many years ago.  It's in the archives.  I'll try to find it, and post a link.  After I got the dome in 2009, I disassembled the panels.

 

Post #9 in this thread: https://www.cloudyni...s-wo-being-one/

Thanks!

 

That looks like a great solution for my neighbors Wal-Mart parking lot style lighting around their house.... 


Edited by TikiTom, 29 July 2019 - 06:07 PM.

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#6 jcj380

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Posted 30 July 2019 - 12:33 PM

I put the t-connector bases of my PVC and shower curtain light blocks in the parts bin and switched to 3/4-in steel flanges that I clamp to the railing around my deck.  A 2-ft length of PVC goes into those vertically and then the spans with 90-deg elbows that support the curtains plop down on the vertical pipes.  No real difference in set-up time and less PVC to haul out.


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#7 Orion68

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Posted 30 July 2019 - 01:44 PM

Very nicely done!

 

This is something I need to do but have not pulled the trigger yet and my viewing location is a little tricky for screening it off.

 

My very, very temporary solution is a laughable, ugly Rube Goldberg type of contraption. Can't imagine what the neighbors think when I put this thing out bigblush.gif

 

Made out of taped together cardboard boxes and a few wood shims, and then mounted on a bicycle repair stand. Since it is portable and adjustable I can easily adjust it to block whatever neighbor decided to leave their porch light on all night long.

 

Don't laugh too loud when you see the pictures, it does work, sort of...

 

IMG 20190730 112141590 HDR
Neighbor's garage light blasts out 1,000 watts.
 
 
IMG 20190730 112158987 HDR
Blocking neighbor #1
 
IMG 20190730 112232242 HDR
Blocking neighbor #2
 
IMG 20190730 112317750 HDR
Wood shims glued to cardboard, they lock into jaws of bicycle stand.

Edited by Orion68, 30 July 2019 - 01:47 PM.

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#8 Kendahl

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Posted 30 July 2019 - 04:59 PM

My very, very temporary solution is a laughable, ugly Rube Goldberg type of contraption.

If it's stupid but works, it isn't stupid.

 

In another thread, I remember reading of a guy who printed on the outside of his temporary light shield, "Ask me how to get rid of this ugly tarp."


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#9 Orion68

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Posted 30 July 2019 - 05:37 PM

If it's stupid but works, it isn't stupid.

 

In another thread, I remember reading of a guy who printed on the outside of his temporary light shield, "Ask me how to get rid of this ugly tarp."

LOL, that is too funny. I need to put that on my cardboard screen. Thankfully, I do have one neighbor who is a good friend and he turns off his yard light any time I ask him.



#10 jcj380

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Posted 31 July 2019 - 07:57 AM

You might consider 1/4-in extruded insulation board (green, blue, or pink) instead of cardboard.  Lightweight and paintable with latex paint.  Usually comes in 4x8 sheets but some places carry 2x8s.  Plus it won't get soggy with dew on it.

 

I wouldn't use the white expanded (bead) stuff.  Too brittle IMO.


Edited by jcj380, 31 July 2019 - 07:58 AM.

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#11 Orion68

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Posted 31 July 2019 - 06:21 PM

You might consider 1/4-in extruded insulation board (green, blue, or pink) instead of cardboard.  Lightweight and paintable with latex paint.  Usually comes in 4x8 sheets but some places carry 2x8s.  Plus it won't get soggy with dew on it.

 

I wouldn't use the white expanded (bead) stuff.  Too brittle IMO.

Great suggestion, I didn't know they made such a thing.



#12 C11sd

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Posted 31 July 2019 - 07:46 PM

We have made our WOC (Walls of Comfort) out of 1" PVC pipe and plastic tarps held on with zip ties!
WOC (Walls of Comfort)


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#13 Orion68

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Posted 01 August 2019 - 03:52 PM

We have made our WOC (Walls of Comfort) out of 1" PVC pipe and plastic tarps held on with zip ties!

Yes. this is what I want to do!

 

My issue is that my observing site is my driveway, so whatever I do has to be easily moveable after every observing session. Still pondering how to make it work.

 

Thanks for sharing your picture.


Edited by Orion68, 01 August 2019 - 03:53 PM.


#14 C11sd

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Posted 01 August 2019 - 11:34 PM

The WOC are very light and and the feet swivel flat for storing. The set of 8 walls take less than 5 minutes to set up and take down.


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#15 Myk Rian

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Posted 13 August 2019 - 03:41 PM

Here is what I use. A 5x7 tarp from HF and 3/4" pvc. I pick it up in the middle one handed to move it. Stores flat against a wall in the shed. Just take one foot off each leg and turn the other 2 into the middle.
It comes apart and rolls up in the tarp.

Less than $10. 2622bbea1ea2ee5333acc95c6d6e36cd.jpg

Myk

Edited by Myk Rian, 13 August 2019 - 03:43 PM.

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#16 jcj380

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Posted 13 August 2019 - 04:05 PM

Less than $10. 2622bbea1ea2ee5333acc95c6d6e36cd.jpg

Myk

If you take out the center upright, that's the first frame design that I made.  I hang a black grommet-top shower curtain  from the top crossbar with black zip ties.  I need two to span the back of my deck or I could add the center upright.

 

I'm thinking of ditching the flanges used in my second design and just hanging the crossbar and curtains on some deck rail planter holders.  They have a horizontal U-bracket with a set screw on the bottom, so they're simple to set up.  Plus they don't stand out as much as a PVC frame so I could probably get away with leaving them up full time.  Even less to carry out before observing!


Edited by jcj380, 13 August 2019 - 04:06 PM.

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#17 Myk Rian

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Posted 13 August 2019 - 05:39 PM

I keep the frame white for outreach events. Keeps the public from running into them. They can be painted if you like.
The center column keeps it from drooping. And again, makes it easy to carry/move.

Myk

#18 Kendahl

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Posted 13 August 2019 - 07:19 PM

The tarp makes quite a sail. Unless there was very little wind, I'd have to use concrete blocks to hold down the feet or tie them to stakes in the ground.



#19 jcj380

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Posted 13 August 2019 - 08:03 PM

Cut slits in the tarp?  I leave the bottom of my curtains free so if it gets windy the bottom can spill the wind.


Edited by jcj380, 14 August 2019 - 08:07 AM.

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