I have mailed with Aquamedic several times for lumen-values of their lamps to no avail. They just respond that they doesn't have it.
If you recieve lumen-values for small lamp-manufacterers like Aquamedic be very suspicious to the value. It is a real pain to measure lumens correctly. You have to have a calibrated (and very large!) integration sphere for several thousands of dollars to measure long flourescents correctly.
Large players like Philips, Sylvania, Osram have this equipment so their values can be trusted.