LS1000 is a ready-to-use solar cell test light source. LS1000 has a full-spectrum sunlight "A" class spectral output, +/- 5% uniformity, vertical or horizontal beam output options, typical 6-inch circular spot (1 sun constant output intensity). Customizable spot size. The LS1000 accurately reproduces the full spectrum of sunlight and complies with the latest ASTM solar simulator standards. Many ASTM standards that require G151 and G155 standards can be achieved by the LS1000. The LS1000 can test solar cells in accordance with ASTM standards E948-09 and G173-03e1.