after finding these spreaders on growell I just want to ask are they any good?, are they worth using?, look like they block out quite a lot of light?, who here has used them?
Ahhhh.. Yes these things work. Basically if your plants are fairly close to the bulb then this thing WILL make a huge difference. However if you have a good amount of room lets say you can keep the plant tops 3 foot from the light at all times then your really wont see any advantage of disadvantage.
Basically the spreader keeps from burning plants that get a bit to close.