Ah yes the wattage, that and footprint size is what ultimately led me to buy two of the 180 pro grows vs one of the 260s. While I'm sure either will work well, two 180s seemed like the best bet for my dollar given I only grow 4 plants at a time (5 being a felony in my state). I grow autos and keep them all at different stages so I typically have a new plant ready every month and a half or so. This set up allows me to move them around more focusing one on the taller more mature plants and the other on the babies. I would say that both lights are an excellent purchase, although the 260 has way more flowering leds than the 180 in the end two 180s is what met the needs of my particular garden.