An engineer friend of mine have tested the radium bulb on a m135 ballast frome venture and get 285 watt from the bulb he also tested a sodium and get 395 watt but he have not tested the agro is conclusion is that runing a bulb with that low wattage is harder on the bulb than with the sodium who is realy close to the bulb cause the radium is a 360 watt so he recomand me to fire the bulb with regular 400 sodium but I dont care cause my agro is waht Im looking for :lol: