Planar plasma lamp and method of manufacture

A lamp comprising:

• a first prismatic substrate comprising:
• a first phosphor layer joined to a first broad face of the first plate, the first phosphor layer having a thickness substantially equivalent to the diameter of a phosphor grain;
• and
• a first electrode, joined to a second broad face of the first plate;
• a second prismatic substrate comprising:
• a second phosphor layer, joined to a third broad face of the second plate;
• and
• a second electrode, joined to a fourth broad face of the second plate;
• wherein the first and second substrates are joined together along the perimeter of the first and third broad faces with the first and second phosphor layers disposed between the first and second substrates;
• wherein the first and second substrates are positioned a distance apart and cooperatively define an interior chamber.