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View Full Version : Lux meter vs par meter

bigB
03/21/2011, 08:09 PM
Now I know the difference between these two. But my questions is: why do websites for reefing sell Lux meters when parr is what you need to know?
ast
03/21/2011, 11:56 PM
If SPDs are basically the same, you can convert lux to PAR to approx. compare different lights.
bigB
03/22/2011, 08:07 AM
Can you explain these SPDs?