I was only able to see this in the Wyze App.
I could only find the WyzeBulb description page on the site.
Short Version: 4 bulbs $29.99 + $7.99 shipping (and possibly tax)
Sharing this as more FYI for those that might be interested.
They are currently doing the pre-order for the WyzeBulb. Its a 4 pack for $29.99. From the video it is all controlled through the Wyze app, no hub required, can connect to Alexa, Google Home and IFTTT. It can be setup to work with the Wyze Sense and setup in groups for same on/off and color settings.
9.5 watt rater power
2.4GHz 802.11 b/g/n support
2700k-6500k Color Temp Range
20,000 hour life expectancy
Indoor use only
Wyze bulb description page [wyze.com]
I do like my WyzeCams and have had good luck with their support when needed. I don't have the Sense, but am considering it (missed the pre-order). The bulb is an easy choice for me.
Shipping per for 1, 2, or 3, 4 packs (for me anyway):
For me 2 4 packs was just shy of $75 (with tax and shipping ~$9.40/bulb). It beats recent TP-Link bulb pricing and I like Wyze so I'll support them, but I know this isn't support the companies you like dot com, so I'll leave it to you to decide if it's slick.
When they go on sale later this year they will run $7.99 each (possibly a 4 pack for $29.99, I don't know)
I don't know if you have to have any products registered or if this is only select people. I know the Sense package was US only, I don't know if this is the same. As of posting this there are 13 days left of pre-order, they are at 28% sold, and it ships in June (18 June for me).