Hello everyone. Let me start by saying that I am not yet a grower, and though I have gathered a good deal of knowledge by lurking around these forums, I still have questions.

Anyway, getting to the point... my question!

Say, I acquired a 400w HPS ballast from a friend or vendor for cheap. Now, I am not going to be running a very large garden, and as such, I do not need a 400w bulb to keep my garden going. I figure, with the garden situation I have in mind, a 250w HPS bulb would be sufficient. My question is, is it safe to screw in a 250w bulb in the socket of a 400w lamp?

This scenario is purely fictitious and created solely for hypothetical purposes.

Any help would be greatly appreciated. Thanks!
PrisonerInGlass Reviewed by PrisonerInGlass on . Lower wattage in a higher wattage ballast? Hello everyone. Let me start by saying that I am not yet a grower, and though I have gathered a good deal of knowledge by lurking around these forums, I still have questions. Anyway, getting to the point... my question! Say, I acquired a 400w HPS ballast from a friend or vendor for cheap. Now, I am not going to be running a very large garden, and as such, I do not need a 400w bulb to keep my garden going. I figure, with the garden situation I have in mind, a 250w HPS bulb would be Rating: 5