AH-Quantuv PAR Meter for Grow Lights, PPFD Meter 400-750nm with UVA Measureme… on July 22, 2026 July 22, 2026 Different wavelengths influence plant growth in different ways. AH-Quantuv displays the separate PAR values of Blue, Green, and Red wavelengths, helping growers understand how their lighting spectrum is actually composed.