High Pressure Sodium Lamps And LED Lamps

1. Luminous efficiency: a single-chip packaged one-watt white LED can reach 110LM, and the luminous efficiency of a multi-chip integrated package is currently only 55-70LM; the high-pressure sodium lamp is 120LM/W, and the low-pressure sodium lamp is 140LM/W.

2. Luminous decay: If the heat dissipation conditions are good, the LED is positive for the first thousand hours, 3%-10% for the first 10,000 hours, and 30% for the first 50,000 hours; the actual measured value of the sodium lamp is the same as The manufacturer’s brand has a lot to do with it. Generally, it is scrapped in two to five months.

3. Color rendering: 70-80, higher if three primary color phosphors are used; 25 for high pressure sodium lamp, lower for low pressure sodium lamp, yellowish color, even if the total brightness is higher than LED, the visual effect is worse than LED

4. Price: The current general market price of LED street light lamp holders is 4000-12000 yuan, but this price is currently declining exponentially. Taking the light source as an example, the price of 80LM one watt of white light has dropped by 6 yuan compared with the first half of last year. There are so many; if the high and low pressure sodium lamp is a domestic product, the general price of a set is about 2,000 yuan. However, the price of accessories such as cables is higher than that of LED cables.

On the whole, it is more cost-effective to use LED for secondary roads and community lighting, and for primary roads, the current price ratio is not higher than that of sodium lamps.