Can I suggest you change the shape of your bulb (the part where the light comes from) so it can match the ones from Philips for instance ? I have seen another vendor with the same design as Philips, it seems more efficient.
The end of the Philips bulb is not straight as yours. Thanks to that the beam is much wider and can even cast some light behind the bulb. Not just in front or on the side.
Philips bulb looks like this: \ /
Yeelight bulb looks like this: | |
I hope you understand what I mean please confirm