gona buy the lights this weekend, its a unit that holds X4 T5 Tubes, two are white and 2 are blue, does that sound right? also need to get the live rock to start the cycle, but because of the price of the lights will only beable to get like 5 - 10 kg, will that be ok to start the cycle untill end of march when i can buy some more, or should i leave the LR and buy it all at once the end of march?