In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Yes, you must have a valid Lumin account in order to buy an item at the Lumin site and use your coupon. During the process of buying an item on our site, you can use your Lumin account to see more of our services.

Normally, one discount code is only applied for one offer. However, If the users put a vast of items in their cart, it is easy to use one coupon code to purchase items. It depends on Lumin's policy, you can contact Lumin via mail for your reference.

To avoid this problem, you should check out carefully Lumin promo code before that promo code could be expired, some promo codes are tied to a minimum purchase, a first-time purchase, or tied to geography, and other reasons.

Usually, Coupon Stacking is not allowed at Lumin. However, the store will surely give out notice if available.