pretty sure all panels are polarized, i know both of mine are. id be very cautious about drilling any 55's
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-Shannon
Current Tank Info: Mixed Reef - 110g Display Tank - C2C Overflow /w Bean Animal | 125g Sump/Fuge | Vertex Omega 150 | Waveline DC12000 | Apex Neptune Controller | Gyre 250's x2 | Ocean Revive LED's | SpectraPure LM3 AWC | Tunze 3155 ATO /w LM3 pump |
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