I bought the 48 ft Super Bright 4-watt light set that would cover my arbor. I liked how the 4-watt panel looked much larger on this version than other options, and indeed it is. Everything arrived secure and intact with all lights working. The first thing I did was to take apart the panel for a peek inside. I was delighted to find that the two lithium batteries are in a holder, not soldered, making them very easy to replace. The batteries are Great Power brand listed as 2000 mAh, and I was pleasantly surprised to find that they tested at 2064 and 2075 mAh giving a starting capacity of over 4W along with being very easy to replace when needed. The bulbs are S14 with removable globes which makes replacing filaments easy. An extra filament is included though I haven't found a source of similar filaments should more be needed. The batteries, being fully charged upon install, powered the string all night. But, in succeeding nights with short winter days and cloudy skies, the lights failed after a little over 5 hours on the dimmest setting. Following a sunny winter day, the lights stayed on all night, again on the dimmest setting. The included remote works great and makes it easy to set the light intensity level. On the dimmest setting the lights do provide nice, subdued lighting but probably less that a bright full moon, but that does make quite a difference on dark nights. Higher intensity levels give more light but for a shorter duration. This is for the 4W Super Bright version. The panel for the standard versions looks smaller and might provide less intense light or a shorter duration. The panel for the 7W Super Bright version looks to be the same as the 4W version, and my guess is that they install two 3500 mAh batteries (which probably aren't when put to the test.) The 7W Super Bright 106-foot version does seem to be the better deal with twice as many bulbs and bigger batteries for less than twice the price. In retrospect, I wish I had gotten that version instead. In summary, the panel is great, the batteries are solid, the lights and wiring are all of good quality with no defects. If you are planning on stringing lights across a wide gap, go to the hardware store and buy 1/8th inch steel cable and install to support the string. Though the wires are good quality, they are not meant to take the long-term stress of supporting themselves over a large gap.