This Doublewise Solar Mini-Obstacle Warning Light DWS202 works as Red Flashing or the red / blue alternate rotation.It can be installed as obstacle light in crane or tower .Because it has the characteristics of self-contained, durable and anti-UV ,it is especially suitable for traffic and barricade warning.

1. Under what circumstances DWS203 with a touch switch should be chosen?

In order to ensure reliable waterproof IP67,we strongly recommend you to choose DWS203 with a touch switch in Marine Applications such as Buoy, Aqua Cage, Seaport, Ocean Engineering etc..
Except for the marine case,DWS203 only need a ordinary switch and its waterproof is IP65.

2.What is the difference of IP67 and IP68?

For solar lights,IP67 is the same as IP68.There are three reasons as follows:

• IP means Ingress Protection.The international safety standard for IP is IEC60529.IP codes have the format IP××,where the ×× represent numerals from the coding scheme(see Table 1 and Table 2);

                                Numeral                     Characterization of Ingress Limit
                                  0 or X                                       Not evaluated
                                      1                                   ≥50.0 mm diameter object
                                      2                                   ≥12.5 mm diameter object
                                      3                                   ≥2.5 mm diameter object
                                      4                                   ≥1.0 mm diameter object
                                      5                                            Dust-protected
                                      6                                                 Dust-tight
          Table I.The first numeral in an IP code indicates the degree of protection from solid foreign objects.

                              Numeral                         Characterization of Ingress Limit
                                0 or X                                                Not evaluated
                                    1                                            Dripping water:vertical
                                    2                                            Dripping water:15°tilt
                                    3                                                    Spraying water
                                    4                                                    Splashing water
                                    5                                                   Jetting water
                                    6                                            Powerful jetting water
                                    7                                            Temporary immersion
                                    8                                            Continuous immersion
            Table II.The second numeral in an IP code indicates the degree of protection from moisture.

• In all practical applications,it is impossible for a solar light to immerse under water for long time because it couldn't be charged in such case.So IP68 for solar lights is nonsense.

• No solar light can pass through the IP68 testing for sure,because it can't be charged for a long time under the water.The IP68 expression in a solar light only be speculation gimmicks and attempts to mislead users.