Upgrade in lighting setup

Hi, I have been using two Exo-Terra Solar Glo 80W bulbs for UV/VIS-photography of birds. While they are usable and work great, I was thinking of maybe upgrading the lighting setup to something more powerfull, since the camera I am using could maybe benefit from some more powerfull light in the UV range. I have therefore been looking into your recommendation of the Iwasaki eyeColour MT70D E27 6500K arc lamp, but was wondering if there might be a newer alternative since I am not finding it easy to locate it and its accompanying equipment.

I am also curious to hear approximately how significant of an increase I could expect of such an upgrade.

Kind Regards Óscar