Install 30 cm above the top of my 4 small house plants (20 to 30 cm high each), and left all night (10 hours) for 15 days, one of my plants, lack the most fragile sun, continued to wither. Only a change of location (in the sun on a radiator) did something. I'm not convinced of the utility. Note that the electrical cable could be thinner which would give it flexibility.