The dimmable YN860 Bi-Color LED Light from Yongnuo is an 18.7 x 18.1 x 3.0" fixture that uses six hundred 8mm LEDs to output color that's variable from 3200-5500K or anywhere in between to match other fixtures or ambient light conditions. The light has a rating of CRI 95 indicating faithful and precise rendering of color. Both dimming and color temperature can be done manually or via the included wireless remote control at distances up to 49'. There's also a smartphone remote control option that's downloadable from Yongnuo's website. The YN860 can be used worldwide using an AC adapter or 4 NP-F750 batteries, which are both sold separately. Using 4 NP-F750 batteries yields 90 minutes of run time with the YN860 set to full power.