Photo and description courtesy of Emaryllis.com :

There is rightful confusion over the spate of newer light yellow/cream hybrids on the market. This seems most likely to be true 'Moonlight.'  'Lemon Star' is very similar, but with flatter form and larger diameter. 'Luna' has more stubby tepals and chunkier flower buds, but coloration very similar. They all tend to start out with a definite yellow cast, that gradually fades to cream or white with a diffuse green heart. 'Moonlight' usually has tepals that are more creased, fluted, or irregular.

Bulbs are 26 cm. This size generally produces 2 blooming stems.