LED lamp for light source and method

An LED lamp comprising:

• a first base unit;
• a first LED chip configured to emit a first light, the first LED chip being located in the first base unit;
• a first shielding member located adjacent a portion of said first LED chip, the first shielding member forming a first window having a first shape such that the first light is emitted from the lamp via the first window of the first shielding member and having a shape defined by the first shape;
• a first light distribution characteristic forming structure located adjacent the first shielding member and configured to cause the first light to have a first light distribution characteristic when emitted from the lamp;
• a second base unit;
• a second light source configured to emit a second light, the second light source being located in the second base unit;
• a second shielding member located adjacent a portion of said second light source, the second shielding member forming a second window having a second shape such that the second light is emitted from the lamp via the second window of the second shielding member and having a shape defined by the second shape;
• and
• a second light distribution characteristic forming structure located adjacent the second shielding member and configured to cause the second light to have a second light distribution characteristic when emitted from the lamp,
• wherein the first light distribution characteristic is different from the second light distribution characteristic.

A method for using an LED lamp comprising:

• providing a first base unit and a first LED chip located in the first base unit and capable of emitting a first light;
• providing a first shielding member located adjacent a portion of said first LED chip, the first shielding member forming a first window having a first shape such that the first light is emitted from the lamp via the first window of the first shielding member and having a shape defined by the first shape;
• providing a first light distribution characteristic forming structure located adjacent the first shielding member and configured to cause the first light to have a first light distribution characteristic when emitted from the lamp;
• providing a second base unit and a second light source located in the second base unit and configured to emit a second light;
• providing a second shielding member located adjacent a portion of said second light source, the second shielding member forming a second window having a second shape such that the second light is emitted from the lamp via the second window of the second shielding member and having a shape defined by the second shape;
• providing a second light distribution characteristic forming structure located adjacent the second shielding member and configured to cause the second light to have a second light distribution characteristic when emitted from the lamp, wherein the first light distribution characteristic is different from the second light distribution characteristic;
• emitting light from the first base unit and second base unit;
• and
• combining the first light from the first base unit with the second light from the second base unit to provide a light that has a light distribution characteristic that is different from either of the first light distribution characteristic or the second light distribution characteristic alone.