PAR question , high pressure mercury

ibanezfrelon

Guru Class Expert
May 18, 2010
205
0
16
44
croatia
I'm building a lighting hood that will hang over my 20gal tank.
It wil have 2 high pressure mercury bulbs , 125w each , putting out 6200lum each.
I don't have a PAR meter so based on the experience of you that have it, how high above the tank must i hang the hood to have some 100 micromoles on the substrate?
I will use this hood for emersed , dry start , and that's why i'm using strong light in it.
 

ibanezfrelon

Guru Class Expert
May 18, 2010
205
0
16
44
croatia
The light is setup. I have lifted the hood some 45cm above the tank , will see how it will do:D:cool:

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