Again, why are you using 5 hours per day? When used as a photo frame, this is going to be on for a lot more than that. The pathological case here is it's on for 24 hours per day, not merely 5.
Because the 87 kWh total is based off the assumption of 5 hours per day. We need to use that to get to the actual wattage. Once I have the wattage, I can use that to get to the 24 hour per day 365 days per year usage of 418 kWh.
Another way of getting there is taking the 87 kWh estimate and multiplying it by 24/5 to get 418 kWh.
Ahhh, now I see what you're doing. I found a source that says 118 W though, so I guess it's just a case of dueling sources at this point. If someone owns one of these and has a Kill-A-Watt then we can find out for sure.
