Correct Martin!
I didn't use a bigger lamp because I was worried about the heat that they give off. If I would have used 175 W med base ED17 instead of the 50W med base ED17 the light would have spanned across a lot better. The down side would be the same amount of heat as a standard 175W MH mogul base ED 28 lamp, a shorter lamp life, higher cost for the lamp, and not as easy to find locally. By shorter lamp life, I mean ~200 hrs, then all of a sudden something fails in the lamp. The MH 175W in the med base ED17 format cost on average ~$37 each vs. the bigger ED28, which cost ~$21 each. In general I have not had very good experiences with the smaller, more compact 175W ED17 med base lamps. The best solution I have for the work light issue is the flat LED rope light-> should be here in a few days.