ECN Forum Forums General Topics of the Trade General Discussion Area HPS Fixture Question

If an HPS fixture was relamped and it lights but someone complains that it is not as bright as before, what could be the problem? I believe that the bulb is right (150W), but what would happen if it was not? What would happen with a 150W bulb in a 70W Fixture?

Or, is this a sign that some internal part(s) had failed?

Thanks for any replies

Bill