Yes

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No. The Umayyads ruled initially from Damascus (660s-750s) until they were overthrown by the Abbassids. Abd er-Rahman re-established the Umayyad Caliphate in Al-Andalus (Islamic Spain) in the city of Córdoba. The Umayyads ruled from this city until the dynasty ended (750s-1030s).

However, the Umayyads never ruled from Medina.

i try to change bulb on a kawasaki 750s instrument panel ,what type of light i use?

I would guess it started off somewhere around 660s, and ended about in 750s, I do not know the exact numbers, but these are pretty close!