What makes blue light? Rambo: "It glows blue!" - Unfortunately, very dark and very very short. The lamps are much smaller than would be expected on the image. If one puts a row, you've just 1.5 meters. (Very little cable). The light emission is virtually non-existent. Other LEDs (also in blue) are 10x brighter. I have tested the chain has several locations. No matter where, it was always only a very short duration of light. (If the panel - only 2 small solar strip). These solar chain is the weakest light in my garden by far. For the price you get far better lamps. Conclusion:, consider the disadvantages before you buy.