In principle it would be possible, and you certainly used to see mercury vapour bulbs (not tubes as far as I know) run between phases for lighting places like stadia, where the large size of the site makes voltage drop a concern, but quite often with the ballast ( which is really an impedance matching network if you like) at the bottom of the pole, often with adjustable taps to match the voltages. Nowadays they will be the more modern high pressure sodium or metal halide or some sort, and soon to be replaced by LEDs no doubt.
In principle it would be possible, and you certainly used to see mercury vapour bulbs (not tubes as far as I know) run between phases for lighting places like stadia, where the large size of the site makes voltage drop a concern, but quite often with the ballast ( which is really an impedance matching network if you like) at the bottom of the pole, often with adjustable taps to match the voltages. Nowadays they will be the more modern high pressure sodium or metal halide or some sort, and soon to be replaced by LEDs no doubt.
