Many of the most common plants that thrive in acid soil also prefer partial shade. You do have choices, however, that will grow well in full sun. Some varieties of azaleas (Rhododendron), such as the Northern Lights series, appreciate full sun in Zones 4-10. Blueberries (Vaccinum) are a good choice to add fall color and fruiting in Zones 3-9. Manzanita (Arctostaphylos) adapts to sunny acidic sites in Zones 8-10. Scotch heather (Calluna vulgaris) and winter heath (Erica carnea) are shrubby perennials for Zones 5-7. Most hollies (Ilex), Zones 3-9, will grow in acidic sites in full sun. And dwarf forms of spruce (Picea), such as bird's nest spruce, or pines (Pinus) would also be good choices. Various selections of these conifers are hardy in Zones 2-10.