Amaryllis bulbs are sold to flower around Christmas time, so I suspect that it will be gathering energy from the light to produce nice healthy flowers nearer Christmas.

I have never bought one before because of the flowering situation, but have been tempted by the packaging.

Hi, They also need a dry, dormant season, so in late summer, stop watering and allow the foliage to shrivel. Keep the bulb (still in its pot) completely dry in the garden shed or under a greenhouse bench until early winter.

When the temperatures start to drop below 10C, bring them into the warmth and begin gentle watering and feeding again and your bulb will re-shoot. Don't re-pot it for the first couple of years; it hates root disturbance.

I agree with Alex although the bulbs that flower at Christmas are Hippeastrum other amaryllis such as crinums Brunsvigia and other rare South African bulbs flower at various times of the year and also can take many years to reach flowering size(Pseudogaltonia clavata can take 21 years from seed mines 13 years old) also all amaryllis bulbs can sulk if they are moved repotted and they will not flower last year I got some bulbs from a very good internet source as flowering size and they have not this due to them be repotted this year they are showing good leaves and the will flower around April/May time