magnetic ballast for high-pressure mercury vapour lamp 220v/230v/240v 50/60Hz 50w 125w 175w 250w 400w CCC/CE/ROHS Magnetic ballast for high-pressure mercury vapour lamp(close type)Characteristic:This series of products have the features of good looking,small size,compact structure,steady performance and high efficiency,they play the key role in lighting electric circuit,they also possess the ...