BULBS OR LEDS?
Small bulbs with tiny filaments for model railways have been around for a long time. These tiny bulbs are referred to as ‘grain of wheat’, with smaller ‘grain of rice’ bulbs also available. The light given off is natural incandescent light and they can be purchased in a number of colours. They can work off both AC and DC power sources and do not always require resistors in the electrical circuit. Light emitting diodes use a phenomenon called ‘electro- luminescence’. The science behind it is complex and involves electrons and photons. All you need to know is that they generate light when electricity passes through them, but there’s no filament, like a bulb. here are the benefits of each: