FYI: Light Measurements under T5 lamps

[kavanaru]

I just updated orchid lamps from T8 to T5, and went for a larger set. Obviously, I understimated the power of these lamps and need to find a quick solutuon, before my plants get completely BBQed. The problem is not the hight output of the lamps, but also the increased temperature (I have masured 28°C = 82K) and the leave of some plants are really too warm...

Light measurements:

6x T5 à 80Watts each (supplemented with individual reflectors - one per tube) - 6500K/3000K ratio 2:1

3 inches below: 5973 Fc
6 below: 4600 Fc
9 below: 3500 Fc
12 below: 2400 Fc
15 below: 1570 Fc

4x T5 à 80Watts each (no individual reflectors) - 6500K/3000K ratio 3:1

3 inches below: 3900 Fc
6 below: 2600 Fc
9 below: 1500 Fc

all meassurements done below the central part of the lamps!