timer question

i need a grounded timer for my lights and i was wondering if this device is suitable enough to handle (2) 150 watt hps's and (4) 30watt cfls. it says it rated at 15 amps so i think its good enough, i just need some opinions. thanks,

http://www.amazon.com/Marineland-Li...4?ie=UTF8&s=home-garden&qid=1265489622&sr=8-4