A point light, spotlight, or weblight in a drawing is represented by a light glyph. You can control the appearance and visibility of light glyphs.
The color and size of light glyphs can be changed with the Light Glyph Appearance dialog box.
Options.The visibility of all light glyphs in a drawing can be enabled or disabled.
Lights panel (expanded)
Light Glyph Display. 
The visibility of whether light glyphs appear on a plot can be enabled or disabled.
Alternatively, click Visualize tab
Lights panel
Dialog box launcher.
In the Lights in Model palette, select the lights you want to modify.
Palettes panel
Properties. 