... -5.2.Specification(1×20W LED lighting source) H4000.3.Solar Panel: 80W, monocrystalline, 20 years' warranty.4.Rechargable batteries: Maintenance ... .Controller: Digital programmable, switch on/off by light and time setting.6.Light source: Cree LED light source, with100 lm/W, total 20W ... 5 days above.10. Work temperature:--30oC ~ +50oC.11.The lamp frame is zinc-plated and plastic-coated.12.Wind-resistance ...