Lights and Writes - it is supposed to

Lights and writes, is working. I use pens such a long time. For night operations in dark conditions and without headlamp such pens are perfect. The paper is well illuminated. The mine writes clean and good. The push button for switching on the lamp is secured with a cap to prevent accidental start. However, it seems to me the cap auszuleiern quickly and then fall - we will see.
I ordered three pieces of the pens.