Should your plants get an over-exposure or under-exposure to the customized growlights, their health would be affected, even if it is a over or under-exposure of a mere 10mins.
 
An automated timer that can ensure that your Tropi-Trap Evo system would get the exact 12 hours required growlight exposure every system requires. With this automated timer, gone are the days of setting alarms to turn your customized growlights on and off.