Is a planter light a bad idea?
Well I took some time to try and find this fixture to see if it was listed and the voltage used and light source.
“Beautiful halo” appears to be at best a horrible company at worst a total scam company. So I would not do any mail order from them 620 reviews 565, 1 Star reviews and only 24, 5 star reviews.
Could this be done with a live growing plant? Yes this could be easily done with low voltage that is finger safe.  Voltages (you can touch the exposed conductors and not get shocked)  or line voltage with GFCI protection built in.
Today LED lamps could be in both options low voltage or GFCI protected. with only 6-9 watts of power consumed a fixture of that size may not feel much more than warm if that.
Wavelength of light 4500-7000K light spectrum would be good for vines or leaf growth. mix in some 2000-3000k LED’s and that would help with flowering so it is feasible it could be done safely and even get a listing.
As I mentioned swimming pools have wet niche light fixtures  and they are safe when properly installed plant light Fixture should be easy.
I would make sure it has a UL listing if being used in the US.
Not all stuff is safe or listed on the internet some just junk but if you purchase it at a brick and mortar store in the US you are usually safe as they can get in trouble for selling non listed equipment.