Cast LSCs based on the red-emitting dye LR305 embedded in a PMMA slab in rectangular geometry dominated the early scientific literature in the field and are commonly used as a standard against which to benchmark the performance of new materials combinations. LR305 typically exhibits a high photoluminescence quantum yield (PLQY >90%) in the solid-state, is dispersible in diverse solvents and matrices, and shows good photostability. However, its small