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You could change your two fixtures ( just change the ballast in your existing fixtures, use electrical ballasts) to 40watt bulbs giving you an increase in lumen output of about 30% from t8's to t12's. Power negligable. Then for sure, go with Full Spectrum bulbs of 5000K or better. Buy the...

The fixture type will depend on the ceiling, canned lights with Full spectrum 5000K or higher work great, but require more electrical than the 2 lamp 4foot fixtures. The lumen output with 4 foot F32T8's is much higher than with the PAR CFL's you would put in canned lighting. The most...