Xmass discount

[happy_2b_kot]

Hello Community,

Need your advice. We have started on our website (TmplatesFlow) Christmas Company. To increase number of customize orders we have made a discount for all our clients. All customization services from 26.11 till 25.12 will be 10% lower.

So what I want to ask - first one - is 10 % normal? Should it be higher or lower? Because I have chosen 10% by chance.
And the second question is the following: how much will it increase the number of clients? Do these programs work normally in the internet? Anyone has tested this on his web-store?

Thanks in advance.