American Electric
The cobraheads that started it all:  the Model 13 (above left, 100-watt mercury) and Model 25 (above right, 250-watt HPS full cutoff).  They would later become the basis for the larger Model 327.
Model 113, 150-watt HPS. Model 125, 400-watt mercury.  The current-generation M400 from GE also looks like this. Model 327, 1000-watt mercury.
Durastar 2000 full cutoff, 100-watt HPS.
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