Rapid LED’s Royal Blue Veg Puck (450nm) is a compact supplemental LED module for adding blue energy during vegetative growth. The 67 x 67 mm board integrates Cree XP‑G3 Royal Blue emitters powered by an onboard Mean Well LDD‑700LS constant‑current driver and runs from 12 V DC with a 7.5 W total draw. It supports optional 2.5–6 V PWM dimming, accepts a Carclo 10613 lens, and includes a 5.5 mm OD/2.5 mm ID DC jack with 35 mm and 50 mm mounting‑hole spacings. Rapid LED recommends two pucks per 4' x 4' veg area, particularly for supplementing HPS or low‑Kelvin LED fixtures to encourage compact internodes. The spectral peak is centered at 450 nm, and the puck does not require a separate heatsink.