Philips Advance signPRO line a brand synonymous with full line, high quality sign ballasts offered exclusively to the sign industry to support the market's broad range of sign applications, now adds: four new energy efficient signPRO electronic fluorescent sign ballasts for T8/HO and T12/HO high output (800mA) lamps. Philips Advance signPRO line a brand synonymous with full line, high quality sign ballasts offered exclusively to the sign industry to support the market's broad range of sign applications, now adds: four new energy efficient signPRO electronic fluorescent sign ballasts for T8/HO and T12/HO high output (800 mA) lamps.