Lights can be conservatively bounded within a depth range. Embodiments can comprise a support base having an aperture defined therein, the aperture being shaped and dimensioned to accept a fluid delivery valve. Measurement data is either sent in the regular signal or in a measurement event driven signal. The object references and interior references are then reported to the garbage collection system or service. The aqueous photocurable resin composition of the present invention comprises at least water, a polymerizable material polymerizable with radical initiation and a water-soluble photopolymerization initiator which generates a radical with light, wherein the polymerizable material has at least two polymerizable functional groups and one anionic functional group.