LED's Lumen and Spectrum why you choose the 1w or 3w lead instead of 5mm or 10mm le

For what I know for know is that the thing it matters with LEDs for growing is the spectrum not the lumen and that is a serious question for me.correct me if I'm wrong and tell me why do you think that the 1w or 3w are more efficient ? because of lumen?

200 – 280 nm UVC ultraviolet range which is extremely harmful to plants because it is highly toxic.

• 280 – 315 nm Includes harmful UVB ultraviolet light which causes plants colors to fade.
• 315 – 380 nm Range of UVA ultraviolet light which is neither harmful nor beneficial to plant growth.
• 380 – 400 nm Start of visible light spectrum. Process of chlorophyll absorption begins. UV protected plastics ideally block out any light below this range.
• 400 – 520 nm This range includes violet, blue, and green bands. Peak absorption by chlorophyll occurs, and a strong influence on photosynthesis. (promotes vegetative growth)
• 520 – 610 nm This range includes the green, yellow, and orange bands and has less absorption by pigments.
• 610 – 720 nm This is the red band. Large amount of absorption by chlorophyll occurs, and most significant influence on photosynthesis. (promotes flowering and budding)
• 720 – 1000 nm There is little absorption by chlorophyll here. Flowering and germination is influenced. At the high end of the band is infrared, which is heat.
• 1000+ nm

I answered in the sticky thread. And by the way the quantity of light (lumen / radiant watts / PAR) is as important as the spectrum.