What does par 38 mean on a light bulb?

What does par 38 mean on a light bulb?

Parabolic aluminized reflector
What are PAR38 Bulbs? Parabolic aluminized reflector (PAR) 38 bulbs control light more precisely. LED PAR lights produce about four times the concentrated light intensity of general service A shape incandescents, and are used in recessed and track lighting. Therefore, a PAR 38 is 4.75 inches in diameter.

What PAR do corals need?

As a general rule of thumb, corals require the following PAR levels: Soft Corals (zoanthids, palythoa, mushrooms and leathers): 50-150 PAR. LPS Corals: 50-150 PAR. Hard Corals (stony corals, small polyp stony): 200-500 PAR.

Can LED lights grow coral?

Yes, LEDs do grow coral – just ask our experts at LiveAquaria.com! They have been using LED lighting for quite some time now over our coral tanks with amazing results. The specific spectrums provided by LED lighting can bring out colors in certain fish like you’ve never seen before.

How long should LED lights be on in a reef tank?

between 9 and 12 hours
Essentially, the ideal time to have your lights on full is between 9 and 12 hours. Providing ramp up and ramp down time if possible. This gives the coral enough time (roughly 9 hours) to grow and reward from the photosynthesis.

Is PAR38 the same as BR40?

PAR38 will fit – the number denotes eighths of inches wide, so PAR38= 38/8″ width, or 4 3/4″w. A BR40 is 40/8″ inch wide, or 5″ wide. About the same size and will fit in the same fixtures.

What is the difference between PAR 30 and par 38?

Now the bad news: PAR38 and PAR30 refer to the physical characteristics of the bulbs. PAR = Parabolic Aluminized Reflector, 38 = thirty-eight eighths of an inch, or 38*1/8″=4.75″. 30 = thirty eighths of an inch, or 30*1/8″=3.75″. As you can see, PAR38 has a larger diameter than a PAR30 bulb or can.

What is a good par for a reef tank?

150 to 250 PAR
The big takeaway is captive corals are happiest with moderate light intensity. Too much light will inhibit or harm the corals. There is no absolute rule on the perfect PAR for all corals, but a good starting point is 150 to 250 PAR. So, how do you choose the right light fixture for your tank?

Do corals need more blue or white light?

corals use more of the blue white and humans use more of the white. but take that with a grain of salt, corals can utilize a lot of the light spectrum, however blue light is more useful then white light.

What light is best for coral?

For optimal coral growth, you will generally want a full spectrum of light that includes some reds, oranges, and yellows, but that is heavier towards the blue range. There is a current trend in the hobby towards very blue, nearly dark aquariums, with glowing corals.

Do corals need blue light at night?

Blue light is the light that regulates circadian rhythms (day-night-rhythms), mainly through the cytochromes, receptor pigments of nearly all life forms, from bacteria and yeasts to humans. When blue light is on the signal is that there is no dark period which can disturb corals severely and will not make fish lucky.

Can I use PAR38 instead of BR40?