See the high-definition solution for solid-state lighting from the PAR 38 replacement lighting competition

LPrize is a competition organized by the US Department of Energy to encourage the development and production of high-quality, energy-efficient solid-state lighting (SSL) products to replace the most common general lighting products on the US market, including the 60W A19 incandescent Lamp and PAR 38 halogen incandescent lamp. The "PAR 38 Replacement Lighting Competition" has allocated $5 million for the development of replacement lamps for the PAR 38 halogen incandescent lamp. The technical requirements for the replacement of PAR 38 halogen lamps are as follows: light output minimum 1350lm (initial); luminous efficiency minimum 123lm/W; correlated color temperature 2700K-3000K; color rendering index is 90; beam angle: spotlight 10-20; floodlights are 25-40; power is up to 11W; power factor: residential lighting ≥ 0.70, commercial lighting ≥ 0.90. At this stage, it will be quite challenging to complete these requirements.

For example, suppose that according to the current CREE chip's best lumen indicator of 208 lm / W, the phosphor efficiency reaches 75%, the heat dissipation efficiency reaches 88%, the light efficiency output efficiency reaches 80%, and the driving efficiency is 94%, then the overall light effect is 103lm/W. Correspondingly, the phosphor faces the warming of the fuel to transfer warm light, the heat dissipation efficiency is severe, the heat is reduced, the thermal stability of the packaging material, the light output is faced with the color mixing, the requirements of the spotlight, and the driving face is reduced in small space and heat. Driving efficiency and other challenges. At the same time, the retail price target for PAR 38 alternative luminaires is also declining. It is expected that this product will be sold for $14 after three years, and the production cost of this product cannot exceed $7, so the cost in packaging. The proportion must be 2$/klm to best reflect the package value.

In the future, the market share of warm white light will greatly exceed the cool white light, which will exceed 60%. However, from a technical point of view, high-efficiency warm white light is more difficult to achieve. One solution for achieving warm white light is to add red light phosphor through blue light, but the light output efficiency of the phosphor is relatively low. The Taiwan wafer optoelectronic solution is realized by red light plus blue light chip. The luminous efficiency and color rendering index of the phosphor are better, but the cost is still relatively high.

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