There is reflective material (look closer). They just darken the areas around the reflector that have little to no affect on light output.
I'd still go with HIDs though, cause our lights suck.
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'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne