1) Ablaze at noon 2) Bathed in rays 3) Bright 4) Bright and shining 5) Bright and warm 6) Bright as day 7) Bright by day 8) Bright in daytime 9) Clear 10) Fair 11) Fine 12) Light 13) Lighted by sunlight 14) Lighted by the sun 15) Like a solarium 16) Like an atrium 17) Like daytime 18) Like some bright rooms 1) Sunstruck 
• (a.) Lighted by the sun.
Sun'lit` adjective Lighted by the sun. 
[adj] - lighted by sunlight
sunstruck adjective lighted by sunlight; `the sunlit slopes of the canyon`; `violet valleys and the sunstruck ridges`- Wallace Stegner
lighted by the sun.