Light intensity conversion

[aclum]

Hi,

I was reading an article about lighting seedings after grafting and there were references to mols or mini-mols (???). I can't do the symbols on the keyboard exactly but it starts with sort of a "u" with a leg down on the first upright of the letter and goes sort of like this:

umol/m squared/s

I'm sure anyone who might be able to answer my question knows what I'm talking about

Can anyone tell me what the equivalent to 250 and to 135 of these units would be in fluorescent light wattage and distance from seedlings? I'm currently using t-5 lighting but have t-8 and t-12 available.

Thanks!
Anne