I have a device that is constantly lit by a neon lamp. Is the consumption of this lamp not too high?
The neon lamps are among the devices that produce light of less consumption that exist. In fact, if we take into account that the current in a neon lamp is minimal, even if it is permanently connected, there is no appreciable increase in the energy bill. We can give as an example, a neon lamp that, connected in the network of 110 V uses a resistor of 220 k ohm in series. The consumption of this lamp will be:
P = V2 / R
P = (110 x 110) / 220,000
P = 12 100/220 000
P = 0.055 W or 55 mW only.
This lamp will need approximately 18 thousand hours to consume 1 kW which is around 50 cents of dollar.
