I have a 175 watt 6700K mogul base MH bulb in a white Coralife round pendant on my 54 gallon planted tank. I see the longer style florecent and MH pendants can be retrofitted with a reflector like surface. Do the bell shaped pendants have such a shiny metal like surface that can be added and placed inside the pendant, or is something like that not needed? Also what do you feel is the best mogul style MH bulb brand to use for 175 watt ballast? 6500 K, 10,000 K, etc. and what brand would you go with?