Im not too sure, I'm not a member myself as i only have 2 LS birds in a mixed flock, although I'm incubating more from this pair, so i might get to joining :p
mine lays an egg a day for like a month, then it might take a day off. They're also really friendly. In england in winter my light sussex lays as regularly as in summer pretty much, but its not as cold over here!
I want to cross my LS with my barnevelder just for fun, but i've been on chicken calculator and they don't have LS, does anyone know what i would get, like colour and egg colour etc thanks in advance :)