I have been through a number of threads on bulbs for the bubbling tubes. My unit has the E-10 screw base. After looking at the big web sites and checking the bulb numbers I found in the threads, seems this table is the set of choices I have. The 1449 appears to be the highest wattage 14v bulb. Does anyone know of or has anyone tried a higher wattage 14V bulb? Based on a few experiments, it seems like around 3.2 watts is the sweet spot for my unit.
I would hate to run a separate 18v buss to this accessory, plus with 8 bulbs it is quite the load all by itself