Ice cap ballasts can run different types of fluorescent lamps, even with a mixture of types of lamps per unit VHO
(1500 MA), HO
(800 MA) and standard (425 MA). Powers 2' to 6' (not exceeding the maximum wattage) between 140-480 watts, up to 16 ft. length. Bulbs or endcaps are not included.
Other sites mention it goes up to 440W max.
You could run 3 140W bulbs for a total of 420W which is only slightly under your current W total of 440W.
I found a 95W bulb at aquatichobbyaquariumsupply.com
but haven't seen 110W 60" yet.
I've always thought 110W VHO
bulbs were mostly 48".