I have some LED channels that I use in the yard for Halloween decorations and I wanted to mount them so that I could fix the angle that they were pointing.  I designed these mounts to be used in the yard (with the spike) or on a flat level surface (with the floor base).

These were designed for the deeper LED channels.  Specifically, I used these channels from Amazon - https://www.amazon.com/dp/B0BR3HBRB8?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_11&th=1
You will need at least two of these for each 1M LED bar.

You will need 1 M3 nut and 1 M3 x 12mm screw to fasten the pivot to the base.  You will need another M3 nut and 12mm screw to attach the base to the spike.

The tab on the point of the spike is there to support the steep overhang during printing.  It can be broken off after printing.

I printed this in ASA at .20 layer height.