Hi,
For some florescent tube, you may be able to find the color temperature and lumin per watt on the paper sleeve ...
I think the warm white color temp for normal florescent tube is around 4500K and the cool white is about 6200K-6500K. There is one florescent tube with color temperature of 6700K. There are also normal color florescent tube with color temperature of greater than 10000K (blue color light) but you will need to verify the value at its manufacturer website if any.
I think besides looking at the color temperature, you will need to consider the lumin per watt. If I'm not wrong, most normal florescent tube has rather low lumin per watt compared to those florescent tube meant for aquarium.
Regards...
Dotty