Maximum light collection is of highest importance. In particular, it helps to lower the detection threshold for low energy muons and increases the detection sensitivity for supernovae. For high energy muons or cascades, it might allow for an increase in the string spacing. Compared to Amanda-II, the light collection will be improved by the use of PMTs with diameter 10 in or larger, giving about 40% better light collection than the present 8 in PMTs. If a sound technological solution is found, wavelength shifter coatings should be applied to the glass spheres. Present results indicate that this may result in a 20–35% better light conversion.
