David, wattage is not as useful for LEDs. The specs give the luminous flux of Sabrina's lamps as 900 to 950 lumens. As far as I understand it luminous flux is more a measurement for the human eye and since blue and red are the wavelengths plants use most whereas we see whiter light as brighter, perhaps the lamps emit more useful light for plants than that, especially since there are only two to three pots?
