The best answer is that there is only a spectrum difference between the bulbs, lumen output is about the same, and IMHO the high end bulbs offer no real proof of better results that justify the cost. Then again, with 10k hours of life, the cost difference to operate over a lifetime is minimal. Have fun shopping!
grolux dual spectrum,its 58000 lumens instead of 55000 like the sunmaster as youll see when you look at the bulbs listed on the web page http://www.greenshorticulture.co.uk/categories/Grow-Lights/Grow-Lamps/Dual-Spectrum-Grow-Lamps/ .plus they are well made too.
I really like the digilux bulbs they work well
How has nobody said HORTILUX? expensive... but they are the best bulbs, not sure if they make low 400w as you need though
How has nobody said HORTILUX? expensive... but they are the best bulbs, not sure if they make low 400w as you need though
#They work, but with no UV (I had pretty good success with a brand new one, then switched to MH). I seem to like the MH Daylight Blue hortilux for flowering and so does "the Rev" (has UVB and I take the glass out of my reflector) . I've also had some great crops using Osram Plantastar (HPS) and the Super Eye Hortilux HPS.
I've heard they are good and almost put an order in for one last week. Gotta wait until next pay.
http://www.amazon.com/gp/product/B0...=1789&creative=390957&creativeASIN=B002S1Y0RI
X2 great bulb. I use all the timeHow has nobody said HORTILUX? expensive... but they are the best bulbs, not sure if they make low 400w as you need though