Nov 10, 2013 · Architectural lighting is intended for mood. There are many lamps options. For down lighting, the ideal lamp should deliver about 20 footcandles at the table top, bar top, etc. Use a mid-range color (4,000K). LED lamp rating is based without dimming. For instance, a rating of 100,000 hours of operation can result in 300,000 hours with a dimmer.