“光老练”在光伏行业内比较认可的翻译是light soaking，作形容词时可写作“light-soaking”。

你可以先参考一下光老练（ light soaking）和“光老练效应”（light soaking effect）的英文释义：

Light soaking refers to the change in power output of solar cells which can be measured after illumination. This can either be an increase or decrease, depending on the type of solar cell. The cause of this effect and the consequences on efficiency varies per type of solar cell. Light soaking can generally cause either metastable electrical or structural effects. Electrical effects can vary the efficiency depending on illumination, electrical bias and temperature, where structural effects actually changes the structure of the material and performance is often permanently altered.

The light soaking effect is the ability of the module to generate several percent more output as soon as modules are exposed to solar irradiation, than it did at the moment of its production, which was fixed with flash list values (the electrical characteristics of the PV module under standard test conditions).

具体来说，我们以太阳能电池中比较有发展前景的CIGS电池为例：

在未经过光照时，CIGS电池处于亚稳态，可通过在AM1.5的光照一段时间让电池恢复到一个高性能的(亚稳)状态，电池功率会高于初始值。一般情况下，CIGS电池经过light-soaking之后，电池效率约增长3-5%；当累积光照时间达到21kWh时，电池功率趋于稳定。这就是所谓的“光老练”效应。

CIGS电池具有“光老练”效应，实际输出功率高于装机量，据现有研究发现，在同等条件下，CIGS电池的发电量高于晶硅5%～10%。