Here's a sampling of bold yellow lighting from around the web, including a simple, cheerful lamp from IKEA (image #8) and an elasticized fabric wonder that looks like a flower (image #2).
1. Perch glass lamp from West Elm.
2. Photo by Alisha Peterson-Irwin, from an Apartment Therapy post.
3. Muse 120 Ceiling or Wall Light designed by Sandro Santantonio, available at Ylighting.com.
4. Omikron Design Stockholm Ceiling Light, available at Ylighting.com.
5. City Pendant in Industrial Yellow by Schoolhouse Electric.
6. Visor Table Lamp from CB2.
7. Watt Table Lamp by BluDot.
8. KVART wall/clamp light from IKEA.
9. Image of an entryway designed by Molly Luetkemeyer, from House of Turquoise.
Images: As linked above.