Large area surface-mounted ambient light fixture with opal or micro-prismatic diffuser, complete with Tuneable White LEDs. The Big Size next is ideal for locations where Circadian lighting is needed without the need for a massive renovation, the products simply install onto a ceiling with mains power (Casambi version) and can then be fully controlled for Circadian light sequences.  
 
The large surface area produces a diffused light with varying colour temperature, giving the impression of natural light.