[Fortuna Wolf]

Any tube type fluorescent is going to be more efficient than a spiral type. The spirals lose between 1/2 to 3/4 of their light due to restrike regardless of reflector whereas a tube will lose from none to 1/2 depend on reflector design.

In addition the screw in bulbs aren't as efficient in giving photosynthetically active radiation as a plant growth tube bulb.

The X watt equivalent is X incandescent watts.