Hello,
Great questions. Yes, compacts & coils are bad. Here is a report for you to read just so you understand more about why they are bad.
http://www.uvguide.co.uk/phototherapyphosphor.htm
The best flourescent tube UVB lights are Reptisun 10, Reptisun 5, or Reptiglo 8. Stay away from the Reptiglo 10, all ESU/Zillas, & the Mystics. If you are wanting a Mercury vapor bulb, try the T-rex active UV heat, or the Megaray. They are both very good.
IF you do decide on sand, the only type of sand that is acceptable is washed & sifted playsand. It does not clump when wet & passes through easier. I would steer clear of any sand that is calcium based, period. Such as the calcisand, or reptisand.
I hope that helps.
Let us know if you have any other questions.
Tracie