Why need a channel with diffuser ? 1.Protect the exposed strip from Dust,Moisture and inadvertent touch,extend the lifespan of the strip 2. Provide a New Professional Clean finish to the exposed fixtures,Take your LED strips to the next level 3. Breake up the harshness dots from the led strip without making light too dim, evening out the lights to a fairly smooth glow for background illuminating or on Counter. For Diffusion Effect When it comes to that spotty/dotty LED effect, people often think a diffuser will solve this outright. Buy that is not true ,Diffusion Effect depends on 2 things: 1. The number of LEDs per m 2. The depth of the profile Hence when using LED tapes such as those which only have 30 LEDs per me, no amount of diffuser is going to make the like look seamless. If this effect is desired, we recommend 120-240 LED per m for a seamless constant glow, in combination if any of our profiles over 12mm deep. Steps for a DIY Lighting Project 1.Measure the width of the strip ( make sure it is not oversized in the channel ) and test it 2.Trim the channel and cover to a required length by hacksaw or other devices if needed . 3. Confirm the way of installation such as Drill hole on channel ,By clips or Double sided tape, flush channel end to end for extension 4.Peel off the sticky at the back of the strip ,lay the strip in the channel 5.Snap the cover into the rail from One side to another ,Cable in the end caps Hole and seal the caps if needed 6.Wiring The assembling and be done on the working Surface or away from it