There are two design concepts for LED luminaires: one is designed by Philips in 2008 to design the luminaires for environmental needs, called scene lighting, and the other is designed by Casio in 2009 to meet the needs of people. , called mood lighting. The LED lamps can be divided into two types. One type of LED lamps used for illumination is an LED lamp used for decoration. The lamps with illumination have indoor and outdoor lighting lamps which are basically made of white LEDs. LED lamps used for decoration mainly use red, green, blue and other colored LED lamps, and with IC to control the change effect. Pen painting is a kind of painting made by filling or dipping ink with ordinary pens or special metal pens. It is a line art and belongs to an independent painting category. By controlling the speed and strength of the pen grip, you can draw lines of different thicknesses. Pen and ink painting has a unique aesthetic feeling and is very interesting. It is characterized by the decisive use of the pen, the strong and smooth lines, the strong contrast between black and white, and the fine and compact picture effect. It can not only depict the painted things in detail, but also make a high degree of artistic generalization. Portrait, still life, landscape and other themes can be expressed. Pen Drawing,Art Pen Drawing,Fountain Pen Drawing,Pen Drawing Art The universe in the stone is great , https://www.zdsarts.com