Dereddened K-band photometry vs. spectral type for objects in Table 1 after spectral fitting. Typical error bars would be ±1 subtype in the x-axis and ±0.3 mag in the y-axis. The relationship highlighted in orange is taken from A. Sanghi et al. (2023). Gray symbols mark the positions of confirmed young brown dwarfs in NGC1333, for comparison. The object below the relation at L1 spectral type is NN2. The one high above the line at L4 (labeled with a × symbol) is NN5, which shows clear infrared excess.