New version of this device come with an incompatible WB2L module. They have the following marks on the base:
9w 120VAC 60Hz 105mA
800 LUMENS UL E330072
228-20-38 printed below the wifi logo
NOTE: There are two variants of this bulb, BPA800/RGBW/AG/2(P) (this template) and BPA800/RGBW/AG/2.
This bulb seems to have hardware Gamma correction, so you need to make sure you disable Software Gamma Correction: