With multiple lamps drawing power simultaneously, you'll see an even greater voltage drop. The amount of the voltage drop can even vary from one lamp assembly to the next. If the lamp isn't delivering the proper energy to the print surface, it simply won't cure the ink. To verify that you're getting sufficient curing energy from your system, you have to measure the energy output of the lamps using a radiometer. UV printing without a radiometer is like playing poker against a stacked deck.
Radiometers make it easy to identify potential voltage drops.
Once we identified that voltage fluctuations were making it difficult for us to get a consistent cure, we invested in several step-down transformers. These units allow us to jack up incoming voltage levels when they fall below the levels we need to correctly operate our curing systems. However, due to component incompatibility and related concerns, several of our curing systems could not use step-down transformers, and we had to look for alternative solutions. So we turned our attention to the UV lamps. Lamp concerns Electricity is supplied to a UV lamp through a ballast, which is basically a transformer.