total lights per day

[Aspencer]

If I ran one 18 watt FL bulb for 9 hours per day, that would be 162 watts per day.

If I ran two 24 watt FL bulbs for 3.4 hours...are they the same for the plants?

 

[Fishguy2727]

No, that is not how it works. More weaker light is not the same as strong light.