1. What will be the spectrum impact on plant?

280mm -- 315mm: spectrum has minimal effect on the shape and physiological of plant.

315mm -- 420mm: against the plant further growth.

420mm -- 500mm: high absorptivity of chlorophyll and carotinoid.there is most effect of photosynthesis.

500mm -- 620mm: low absorptivity in pigment.

620mm --750mm: high absorptivity of chlorophyll, there is significant effect of photosynthesis and reaction.

750mm - 1000mm: low absorptivity, influence on the quantity and quality of the flower and sprout.

>1000mm: transfer into heat.

2. Can I use multiples product to cover 3*3area,veg and flower? If so, how many?

10 this type of grow light is suitable.

3. Can I use an e27 holder for this?

Yes you can, on the same time we also received customized special spesifications.

4.How far from the tip of plant's should this be hung?

It depands on the plant. making sure the light is reaching all foliage.

5. How many hours do I need to turn light on to grow three tiny herb plants?

Growth stage 18 hours and flower stage 12 hours a day for most herbs.