external lighting

[sparkyb2]

hello lads , my querie is i have 10 external 500w sodium lights to fit outside a garage building rougley 50 m x 30 m long and i mainly work on house rewires so any help would be gratefully accepted in helping me with materials i need to order as the owner tells me he would like them on a time clock for night time operation and would it be better to use a 3 phase contactor as well to spread out the lights onto 2 circuits of 3 and 1 circuit of 2.
Much appreciate any input please.

 

[sparkyb2]

thanks to all for your help lads its much appreciated.

 

[Spoon]

Just an additional note to the OP. Probably comes across as teaching you to suck eggs but hey...
If you are not going to fit a timer then make sure that when you buy the enclosure for the contactor there is enough room to add a timer in the future.