I come from the architecture and lighting industry. I'd like to mention that we do not use Watts to specify the strength of light emissions, we use lumen. It would be helpful if Octane could use lumen instead or in conjunction with Watts.
Why do we not use Watts? Because lumens are produces as an efficiency ratio from Watts. For example some lamps can have 5 lumen/W or 4.2 lumen/Watt. We don't usually care about this ratio and it is calculated by taking the Watts and lumen values provided to us, it's not provide as a ration on it's own. So... we usually have no idea what the ratio is. This means we have no idea what Watt value we should choose in Octane, or even what lumen/watt ration it would use.
Please provide a lumen value and rethink the Watts value. It's a detriment to people trying to do accurate architectural renders. We don't want to guess our light values. Thanks!