LED Optics

vucious

vucious

Member
Hi,

From what I've read from various sources, it seems like by default, LEDs are about 120 degrees without optics. If that is the case, then why would anyone need to put on 120 optics?

Regards,
Vucious
 
Hmmm... I am not an LED expert, but I have a couple evergrow LED fixtures and they came with 120 optics. Since I had them hung in a canopy I was getting dark shadows in the corners of my tank so I took off the optics and the light spread out to the corners. The par also dropped. I'm no engineer but wouldn't the lack of optics mean the light spreads out in all directions...ie 180 degrees?
 
vucious said:
Hi,

From what I've read from various sources, it seems like by default, LEDs are about 120 degrees without optics. If that is the case, then why would anyone need to put on 120 optics?

Regards,
Vucious
Click to expand...
most r but i added 120 optics and it almost tripled my par so they work plain and simple no argument to really have
 
if you are using for your new 75gal, you might want to use the 90 degree optics for even more PAR, since 75 isn't that wide. I've always used the 120 optics because I get best coverage, but if you are having too much light spillage, use the 90 optics.
 
Thanks, guys. I was just confused to why there are 120 optics when the LEDs are already 120 degrees. But if everyone says they work, I will use them.
 
vucious said:
Hi,

From what I've read from various sources, it seems like by default, LEDs are about 120 degrees without optics. If that is the case, then why would anyone need to put on 120 optics?

Regards,
Vucious
Click to expand...


The Cree X Series is 180 Degrees with most of the light within 120 Degrees.

There is no standard with Optics especially Chinese ones.

Is a 120 degree optic max spread 120 Degrees or most of the light within 120 Degrees and then again what is most of the light.

Each company has its own definition.

Optics are a force multiplier and quality optics can double the PAR and reduce the spill. Cheaper less efficient ones do focus the light where its needed but lack the efficiency of quality optics.

Bill
 
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