If you are looking to install lighting fixture that could go on for a long period and is an ideal selection for commercial projects, this 40W Project Edition Series should be on top of the list.
Ultronics Project Edition (PE) series comes with 2 years official warranty. Following are specifications:
LED: LED 200 Pcs Bridgelux 5730
Lumens: 160 lm/w
Solar Panel Material: 16V/29W, Monocrystalline
Built in Battery: LiFePO4 12.8V/19AH
Recommended Installation Height: 15-18 ft
Dimension: 740 x 340 x 82 cm