1.According to Category Vestralux has two categories – One is high Quality LEDs (Product names Acculite and Veralite), which are used for the applications where high efficacy and color expression are critical in high-standard lighting conditions. The other category is Healthy light LEDs, which include full spectrum light LEDs( product name Sunlite) and low-blue wavelength products(Humiblu, Medablu and Lomablu). 2. In regards to day and night – For day time, Vestralux has full spectrum light LEDs(Product Sunlite), which is applicable for the Long-time artificial lighting and health-care scenarios, offering healthy light solutions for those who seek natural light for their office, workplace or home environment. For night time, Vestralux supplies low-blue wavelength LEDs (titled Humiblu,Medablu and Lomablu), to avoid exposure to the harmful effects of blue light at night. 3. In ragards to application – Please refer to our applications page http://www.vestralux.com/application/ for detailed information on our products and their uses. 3.For more information, please get in touch and our salesman will get back to you. Thanks.