correct, the flowering onset is triggered by the hours of light, the red spectrum just helps flowering, by imitating how the Fall sun's wavelength changes as it lowers on the horizon ... I vegged and flowered for years with only blue lights (not knowing, red would have been better) ... but, why you would want blue light during flowering (after you know red is more effective, is beyond me) ... either way, best of luck to ya :smokin: