How much energy would a tree expend producing light? Would that kill it? If not, what extra input (in terms of nutrients, care, etc) would it need? Would these

How much energy would a tree expend producing light? Would that kill it? If not, what extra input (in terms of nutrients, care, etc) would it need? Would these trees cross-pollinate those not intended to glow? What environmental impact might that have outside cities? Lots of questions.