How much is the general 15WLED lamp luminous flux
Usually around 1200lm. Warm colors will be low, cool colors will be high.
Look at the product parameters, and if it's done with a single 1W, it's probably around 1600LM.
Of course, can also use 30142835 beads to do warm (below 4000K temperature) will be low, cool (above 6000K temperature) will be higher
Mainly depends on what you apply products, parameters vary.1, high-power 1W single 110-120lm to remove the loss of 1600lm.
