Tube Light vs LED: Why Old Tube Lights Flicker and Take Time to Glow

• Old fluorescent tube lights don't light up instantly; they flicker for 2-5 seconds before fully illuminating.
• The delay is due to the process of heating and exciting the gas inside the tube, which requires high voltage not directly available from household electricity.
• A 'starter' component creates the necessary high voltage surge by heating wires, emitting electrons, and then rapidly opening a switch.
• This high voltage ionizes the gas, causing it to glow and emit UV rays, which then produce white light when they hit the phosphor coating.
• Modern LED tube lights or those with electronic chokes light up instantly because they receive high voltage immediately, bypassing the starter's delay.