maybe they changed it on July 2017 when the bulbs were supposed to come out back then.
if that is the case, this means that they changed the chip back then, then sent it for approval which they got on December.
weiwei said that we will not have it on December because of the chip which we can only consider at the moment as an excuse (since we know they got the approval) of why they don't want to release it. even dingyichen is guessing and he belongs to the yeelight staff.
if as a customer went to their CES exhibition and asked them... "hey i like these bulbs... where can i buy them?" what would the answer be? it would be "soon". and this "soon" thing goes on since July.
the reason i am "fighting" this thing is because as a customer i feel like Yeelight is toying with me. i had to postpone purchases for 6 months because i wanted to support Yeelight for their prices and their advantages with Xiaomi's ecosystem and instead of them being "helpful" and say "hey we have no idea when.... maybe! next year. keep that in mind" i feel like i got tricked by them. meaning.... i wanted to buy bulbs for my house and some bulbs for a few clients of mine. it was May 2017? they say that they will be out by July (so that's two months) then they said that it will be out on September.. (that's 4 months i waited) ... then they said December (that's 7 months) and now they said "soon" which means January is almost out which also means 8 months of waiting. sorry for bitching but i hope that i have explained the reason i am being like that.
anyway i will not bother you anymore with this subject. the bulbs will be out when they will be out. period.