No....The first one was a GE M-250R in MV, they are basically cobraheads with a bucket refractor....
The smaller versions used the same bucket refractor most commonly used on the NEMA heads...and the bigger versions used the same refractors found on 400 watt Powerbrackets.....but both as in closed bottom instead of open bottom..
The smaller versions used the same bucket refractor most commonly used on the NEMA heads...and the bigger versions used the same refractors found on 400 watt Powerbrackets.....but both as in closed bottom instead of open bottom..