Verify the basic operation of the different lights used in the feDiffuseLighting and feSpecularLighting elements. The test uses the same feDiffuseLighting filter, using different lights.

The first row shows different settings for feDistantLight. The second row shows different settings for fePointLight. The last row shows different settings for feSpotLight.

The rendered image should look approximately like the reference image, except for the last feSpotLight test for which a reference image could not be created. At the time this test was developed, there was only one implementation of the filter, and no detailed testing has been performed on that implementation to check its accuracy. The reference image may not be pixel accurate. However, the rendered image should show at least 'similar' lighting results and bump maps.