Are you including the cost of batteries, mounts, and charger? I don't own either one so that is why I am asking. I did just check the Dinotte site and they are selling the 800L/400L combo for for $449 so at this sale price it makes sense to get this combo over just one 800L. This combo is supposed to get you 2.5 hours of light at 1200 lumens. What would be the cost of P7's to get similar lumen output with ~2.5 hours runtime when you are including the cost of batteries, charger, mounts? I'm sure it will be still much much cheaper to go the P7 route, but not quite as bad as originally.