To access intermediate bulk hydrogel stiffnesses, hydrogels were cast with equal amounts of the photolabile crosslinkers (i.e., 1:1:1 Rubiq:Rubpy:oNB) alongside varied percentages (0 -90%) of photostable diazido-tri(ethylene glycol) crosslinker (denoted TEG), while keeping the total crosslinker concentration constant (Fig. , Supplementary Fig. ). When sequentially subjected to red, green, and blue light (10 mW cm -2 , 35 min each) and analyzed rheometrically, hydrogels partially softened to intermediate moduli or fully degraded in a manner dependent on crosslinker makeup and wavelength-selectivity. Consistent with polymer network rubber elasticity theory, the incorporation of stable TEG crosslinks into the matrix at varying percentages stabilized the hydrogel at intermediate stiffness following complete lysis of photocleavable crosslinks. Hydrogels with low percentages of TEG (10%) lost all elastic properties after exposure to red + green light, matching Flory-Stockmeyer predictions that ~60% of the available crosslinks must remain intact for the gel to persist (remaining oNB + TEG crosslinks ≈ 40% of available crosslinks). When TEG comprised >60% of crosslinks, the hydrogel was no longer fully photodegradable, yielding a soft stable hydrogel following complete light treatment, further predicted through Flory-Stockmayer analysis (Fig. , Supplementary Fig. ).