PAR

[Mmiller2001]

What is high, medium and low light measured in PAR?

[Daniel]

I am not sure about high, medium and low but I just measured a 36" Stingray at 11" of water with a Seneye and this is what I got:

[Daniel]

Roughly I have thought of low PAR being 40 - 50, Medium being 50 - 80, High being 80 and above. But that is just my own personal scale.

[Daniel]

Here are two 36 inch Finnex Stingrays at 16 inches:

 

 

[StephenP2003]

34 minutes ago, Daniel said:

Roughly I have thought of low PAR being 40 - 50, Medium being 50 - 80, High being 80 and above. But that is just my own personal scale.

I've heard that standard a few times, roughly. Some people say 90+ for high. 

[Daniel]

Just now, StephenP2003 said:

I've heard that standard a few times, roughly. Some people say 90+ for high. 

That sounds about right.

[Mmiller2001]

Awesome, thank you all!

[Daniel]

I don't remember where I came with this list so take it with a grain of salt:

			PAR
			Least	Good	Most
Anubias	angustifolia		40	125	200
Anubias	barteri		40	75	125
Anubias	nana		40	75	125
Anubis Species			40	100	200
Aponogeton Species		High	100	150	200
Bacopa	Monnieri		100	175	250
Bacopa Species			100	175	250
Cabomba	caroliniana	Medium	100	150	200
Cabomba Sp		High	100	150	250
Crinum Sp		High	100	150	200
Cryptocoryne	beckettii		50	125	200
Cryptocoryne	wendtii		50	125	200
Cryptocorynes Sp		Low	40	50	200
Echinodorus	barthii	High	150	200	250
Echinodorus	bleheri	Low - Very High	40	175	250
Echinodorus	macrophyllus	Average to High	50	150	200
Echinodorus	osiris	Average to High	50	150	200
Echinodorus	Ozelot		50	150	200
Echinodorus	palaefolius		100	200	250
Echinodorus	quadricostatus		50	150	200
Echinodorus	Rose		50	100	150
Echinodorus	Rubin		50	150	200
Echinodorus	tenellus		100	150	200
Echinodorus	uruguayensis		75	175	250
Echinodorus Sp		Medium	50	100	150
Hygrophila	polysperma		150	200	250
Hygrophila Sp			150	200	250
Lilaeopsis Sp		High	100	150	200
Limnophila Sp		High	100	150	200
Ludwigia Species		High	100	150	200
Microsorum	pteropus		40	125	200
Microsorum Sp			40	125	200
Myriophyllum Sp		High	100	150	200
Nesaea Sp		High	100	150	200
Nymphaea Sp		High	100	150	200
Pogostemon Sp		High	100	150	200
Rotala Sp		High	100	150	200
Sagittaria Sp		High	100	150	200
Versicularia	dubyana		40	125	200
Versicularia Sp			40	125	200
Vallisneria	americana		50	150	200
Vallisneria	spiralis		40	150	200
Versicularia Sp			40	150	200
Egeria	densa		100	150	250
Egeria Sp			100	150	250

[Mmiller2001]

1 minute ago, Daniel said:

I don't remember where I came with this list so take it with a grain of salt:

			PAR
			Least	Good	Most
Anubias	angustifolia		40	125	200
Anubias	barteri		40	75	125
Anubias	nana		40	75	125
Anubis Species			40	100	200
Aponogeton Species		High	100	150	200
Bacopa	Monnieri		100	175	250
Bacopa Species			100	175	250
Cabomba	caroliniana	Medium	100	150	200
Cabomba Sp		High	100	150	250
Crinum Sp		High	100	150	200
Cryptocoryne	beckettii		50	125	200
Cryptocoryne	wendtii		50	125	200
Cryptocorynes Sp		Low	40	50	200
Echinodorus	barthii	High	150	200	250
Echinodorus	bleheri	Low - Very High	40	175	250
Echinodorus	macrophyllus	Average to High	50	150	200
Echinodorus	osiris	Average to High	50	150	200
Echinodorus	Ozelot		50	150	200
Echinodorus	palaefolius		100	200	250
Echinodorus	quadricostatus		50	150	200
Echinodorus	Rose		50	100	150
Echinodorus	Rubin		50	150	200
Echinodorus	tenellus		100	150	200
Echinodorus	uruguayensis		75	175	250
Echinodorus Sp		Medium	50	100	150
Hygrophila	polysperma		150	200	250
Hygrophila Sp			150	200	250
Lilaeopsis Sp		High	100	150	200
Limnophila Sp		High	100	150	200
Ludwigia Species		High	100	150	200
Microsorum	pteropus		40	125	200
Microsorum Sp			40	125	200
Myriophyllum Sp		High	100	150	200
Nesaea Sp		High	100	150	200
Nymphaea Sp		High	100	150	200
Pogostemon Sp		High	100	150	200
Rotala Sp		High	100	150	200
Sagittaria Sp		High	100	150	200
Versicularia	dubyana		40	125	200
Versicularia Sp			40	125	200
Vallisneria	americana		50	150	200
Vallisneria	spiralis		40	150	200
Versicularia Sp			40	150	200
Egeria	densa		100	150	250
Egeria Sp			100	150	250

Nice!

[FishyJames]

I ran across an old forum for planted tanks.  

Low light 10-30 par

Medium light 30-80 par

High light 80-120 par

 

[starsman20]

Just now, Daniel

I am not sure about high, medium and low but I just measured a 36" Stingray at 11" of water with a Seneye and this is what I got:

You have the best toys.

[Ken]

This thread has just now given me an aha moment that I hope is the answer to my algae problems. I have been treating my 40 breeder like a low light tank, but based on the above it is not. I have the same lighting as @Daniel but fertilize like it is low light.  Most of my other plants in that tank just survive. Maybe the only plant life that can thrive like that that is algae?