Central government on the flags protocol:
Posting and hoisting of the flag
A raised flag should never touch the ground or obstruct traffic, even if the flag hangs at half-mast. Therefore the flagpole must have a good length. Flags may not be hoisted or posted between sunset and sunrise. The flag can stay hanged if it’s illuminated in a way that the colors can be seen clearly.
With PoleLed the flag protocol is no limitation for hanging the flag 24/7 – the PoleLed unit illuminates the flag 360 degrees so it’s always fully visible, even in the dark. It is the reason why the municipalities of Wageningen, Rotterdam, De Ronde Venen, and Coevorden already chose this sustainable LED solution.
Source: www.rijksoverheid.nl