The YN1200W LED Video Light from Yongnuo is a daylight-balanced 13.6 x 9.0 x 2.5" LED light source that can be used handheld via its included handle. While it consumes just 72W of current, it outputs many times that in tungsten equivalency while maintaining a high CRI of 95 for accurate color rendering. The color temperature is 5500K, great for shooting outdoors or in venues with large windows, but you can change the color balance with the 2 included color-temperature filters when needed.
Dimming is adjustable from 1-100% in Fine Mode and 10-100% in Coarse Mode. You can make adjustments locally on the unit but the YN1200W has a built-in 2.4 GHz receiver and comes with a wireless remote that can control color, dimming, and on/off functions at distances up to 49'. There's also a free, downloadable App that lets you control the fixture with a smartphone. The light can run on AC power with separate purchase of an adapter or on up to 4 NP-F750 lithium-ion batteries that have a run time of 100 minutes at full power.