I've been inserting LED light fixtures into PVC pieces, used as a housing for the lamp, for a while now.
They have all been used as uplights - shining upwards into a palm trunk/canopy.
The other day I got the idea to insert the lamps into both ends....so one can shine up and the other down.
When designing landscape lighting - many times one tries to balance out uplighting with downlighting anyway.
I get these LED lamps from Amazon - they are color changing and can be set to any color along with various settings. I usually just set it on one color and leave it that way.
Find the right diameter pipe, cut some pieces, drill out an opening for the wires, spray paint to match palm trunk (brown), insert lamps, seal with silicone, and you are set to install.
I finished 4 of them tonight and will install tomorrow and report back with working pics.
Not sure how I will attach them yet but will think of something.....