How to make a 12' to 15' light post?

[plumkrazy]

I purchased some solar LED 300W street lights to place along my driveway. What I did not think of was how to get a post to mount them to. I saw some Youtube videos where people tried 4x4 posts and they said that a 16' 4x4 stuck 3' into the ground with concrete swayed like the dickens in wind with these lights mounted.

I have tried Amazon and Google to find say 12'-18' steel posts, but my fail has been consistent and enduring.

Do any of you folks have an idea for an affordable and functional street light posts?

The lights I ordered:

300W Solar Street Light, 2 Light Set Motion Sensor Dusk to Dawn 15000LM Solar Lights Outdoor with Remote Control

I used some 2" galvanized pipe with threaded ends 10' sections. Mine is wired and close to a shed but it doesn't wiggle in the wind

 

[coast40]

This may not help the OP in PA, but Metal Tubing For Sale - Shop Now | Repurposed Materials has galvanized 5 x 5 octagonal tubing up to 39' long for around $250 in Texas. They also have irrigation pipe among all the things they have in 5 or 6 locations across the USA. Many smaller items have free shipping.

 

[Henry007]

I purchased some solar LED 300W street lights to place along my driveway. What I did not think of was how to get a post to mount them to. I saw some Youtube videos where people tried 4x4 posts and they said that a 16' 4x4 stuck 3' into the ground with concrete swayed like the dickens in wind with these lights mounted.

I have tried Amazon and Google to find say 12'-18' steel posts, but my fail has been consistent and enduring.

Do any of you folks have an idea for an affordable and functional street light posts?

The lights I ordered:

300W Solar Street Light, 2 Light Set Motion Sensor Dusk to Dawn 15000LM Solar Lights Outdoor with Remote Control

Try an Oil Field Store and ask for a minimum diameter of 6 inches.