XP69 can work by % percentage (0..100%) or by programming the required lux (in this case, the LXD probe must be connected).
When installing the lux sensor you can also switch light of (cut-off function) when the ambient luminosity is higher than the set one.
The work curve can be calendarized on a day by day basis so the right light can be given to animals according to the day of cycle.
When light are on you can set a period of time when the light percentage can be changed to make meal easier.
Two extra daily timers are availble to control lights by on-off system.