Solaro Energy SD2200 Solar Daylight Simulator, 2200 Lumens, 30-Watt Solar Panel 2200 Lumens, 4500K Color Temp, includes 30-Watt solar panel installation kit, 25-Foot wire and all installation materials Better light distribution and color rendition, similar amount of light as two 100-Watt incandescent bulbs Brighter, longer-lasting light engines called opto semiconductors, better than basic LED's Proprietary solar panels made with multicrystalline cells collect sunlight even on cloudy days, convert it into high-performing simulated daylight Creates the same daylight as a traditional or tubular skylight without costly installation or cutting large intrusive holes in your roof and ceiling