on skript load:
    register a new custom enchantment with id name "Radiate"
    set {_enchantment} to "Radiate" parsed as custom enchantment
    set max level of {_enchantment} to 1
    set accepted items for {_enchantment} to "Helmets"

every second:
    loop all players:
        if loop-player's helmet is not air:
            loop-player's helmet has custom enchantment Radiate:
                apply night vision without particles to loop-player for 1000000 seconds
        else:
            remove night vision from loop-player
        stop