Did you say 175 Watt HPS are you sure it is 150 watt unit ?

Anyhow change the bulb first { make sure they are correct wattage to match the ballast } that useally take care of it.

second thing is that do both luminarie have photocell on each unit? if so get new photocell on it.

Merci,Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)