KawiZZR is right, with just .06w each it would be completely useless for cannabis cultivation. The drawback to the GOOD LED lights is their lack of penetration. There are many factors that effect penetration, but when it comes down to it, nothing will help/hurt it more than the actual wattage. And again I concur with KawiZZR, as I would recommend an absolute minimum of 2 actual watts per diode.
It's worth noting that the 2w actual power draw were talking about will be advertised as 3w or, in some cases, 5w diodes. This is because the diode is capable of 3w or 5w respectively, but in the interest of reliability they are throttled down to ~2 to 3 'actual' watts.