As for the wattage, ir's because I think the seller's web site is wrong. The 5050 type LEDs are spec'ed at 0.19 watts (
Warm White 5050 SMD LED | Component LEDs | Super Bright LEDs), which makes a little over 0.7W per module.
It's important to keep in mind though, that 5050 is just the size of the chip - different manufacturers mame 5050 LEDs with different characteristics. In this case, I figured it is better to err on tbe high side. My multimeter is broken, but I'll measure current through o e module when I get a new one.
For the luminous intensity I used the 6000mcd and 120 degree beam angle from the spec, converted using an online converter, and subtracted a few percent to err on the low side of the intensity