The rotolight honeycomb louver is designed for use with the anova led lights it offers the user a tighter control over the spread of the light reducing it to just 40 degrees the lightweight rigid metal honeycomb tunnels the beam controlling spill focusing the light and putting the light only where you want it with minimal light loss the louver can be attached in seconds using three spring loaded locking pins and the filter frame holder and barn doors can be attached simultaneously to simpl