The menorah is very significant to YHWH. Is it okay if we alter it for Hanukkah?
During Hanukkah we see menorahs that have two additional branches added making it a nine-branch menorah or Hanukkiah. This is a tradition that stems from the legendary story of the oil miraculously lasting for eight days after the Temple was reclaimed. Hanukkiahs are so much more popular that when most people think of a menorah they think of the nine-branch Hanukkiah.
In Revelation 2:5, Yahusha issued a stern warning: "Repent from sin. Otherwise, I will come to you and remove the menorah--if you don't turn from sin!" This tells us that, 1) Yahusha wants us to be represented by the menorah and 2) Not being represented by the menorah shows that we have not repented.
YHWH did not make the menorah with nine lights.
I believe we owe the world an accurate symbol of of YHWH.
And that is the seven-branch menorah. The symbol of the cross is questionably used as Scripture strongly implies that Yahusha was put to death on a tree and and a tool of murder is inappropriate to use to represent YHWH. The Star of David does not appear anywhere in Scripture so I think it's reasonable to not use that as a symbol of the faith.
YHWH himself designed the seven-branch menorah. That's the symbol.