To grow and flower well, most bulbs, including tulips, need lots of sunshine from the moment they push through the soil in early spring until their foliage yellows and collapses. Daffodils can tolerate a bit of shade, but if they get less than half a day of sun, they may not bloom in future years. In warm climates, a bit of afternoon shade--even for sun-lovers like tulips--can be a good thing, helping to prolong bloom and keep flower colors from fading.
The following bulbs can get by very well on just half a day of sun or in the filtered sunlight found under deciduous trees. But be warned: No bulb will thrive in deep shade.