Ok Guys, I'm sort of getting the idea on the different classes of Fluorescent Tubes in the market. Please give me your opinion (I hope you're around Blinky)
I went to the the local CanadianTire and found a particular lamp for $19.99, it is called "Gro & Sho Lamp" from GE, 3050K-3450K, 33W, T-12, 24", No special wiring required - just plug in to use. They are small enough to fit two of them in the current light fixture from Wal-Mart, I want to remove the current 18W tube from the fixture and put the two Gro & Sho lamps. I would end up with 2x33Watt. In the box they give you all the details about lumens, kelvins, lux, hours, watts, but I can't remember them exactly off the top of my head . It seems that I can definitelly change the T-12 bulbes if necesary in the future. Removing the current 18 W and putting the two 33W will be an easy enough task for me and I can definitelly handle it.
Thanks again for your opinions and ideas.