I ask because I just bought a 150w HPS Sun System and the guy at the Hydro Shop said that it should work just fine since it's a lower wattage.
He explained that if it was higher than 150 watts, it would not work due to the mechanism that continuously fires in units higher than 150. He said that it could possibly burn out the MH bulb quicker though.
If the above makes sense to you, please explain a little better. Thanks!
***I know this is a lighting question, but I've posted questions like this before in the 'correct' place and hardly get any responses.***