Overdriving involves using an electronic ballast that is rated for more bulbs then your going to use then wiring multiple power leads to just one bulb, making the ballast "think" there is more then one bulb present causing it to drive more power to the bulb. the results from doing this are roughly 50, 75 or 100% more light with 2, 3 an 4 power leads. the actuall power consumption is however less then the total power of the leads, in the 4 power lead arangement its rougly twice the power (or roughly the same amount as there is light output).. the lumen (effective light) output on the other hand is ~150% with 4X.
more information is here if you use the search function, Ive posted links in the past on how this is done.
T-5's dont match up for WPG
I dont know the light output of NO T-5's but T-5 HO
's have the same lumen about put roughly as VHO
of the same length.
wich is roughly the same as ODNO (overdriving NO T-8's with 4 power leads)
or to compare with PC
lighting.. (1) 4" T-5 HO
or ODNO is roughly the same as (2) 55 watt PC
lamps in light output.
hope this helps
and its thoredicly possible to overdive any type of floresent lamps, I wouldnt overdrive PC
or T-5 HO
's with anything but a IceCap ballast (for their programed start feature) to keep the bulbs from dieing. I would really be carefull with this though. some reefers are overdriving T-5 HO
's with IceCap 660's but only about a 20% overdirve (not the normal 200% that is done with T-8 NO lamps)