Artificial Lighting

[Becca]

I have a plant table that came with built in grow lights. I had to write to the manufacture to find out what kind they were and this is what I was told: "There are 2 different bulbs in the fixture, a 10,000K white light bulb which promotes green leaf growth and a special blue/pink bulb to promote plant flowering. Both bulbs are fluorescent T4 bulbs." I was also told that replacement bulbs could be purchased through the same company at a price of $8.00 for the 10,000k bulb and $10.00 for the other bulb. My questions:

1. What is the difference between a T4 and a T5 bulb?
2. What is the life of a T4 bulb?
3.Is there something better and if so why?
4. Are these normal prices for this type of bulb?

TIA!

P.S....and don't I need to know the wattage and how do I find this?