PAR is photosynthetic active radiation. PAR light is the wavelengths of light within the visible range of 400 to 700 nanometers (nm) which drive photosynthesis (Figure 1). … The amount and spectral light quality of PAR light are the important metrics to focus on.
What does PAR mean in LED lighting?
A parabolic aluminized reflector lamp (PAR lamp or simply PAR) is a type of electric lamp that is widely used in commercial, residential, and transportation illumination.
What is a good par value?
So let’s talk benchmarks and the best PPFD/PAR range for your plants! Between 200-400 PPFD: This is great for seedlings, clones, and mother plants. Between 400-600 PPFD: This is great for early to late stage vegging cycles. Between 600-900 PPFD: This is great for the flowering, fruiting, or budding stage of plants.
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 the difference between par 16 and par 20?
We mentioned that LED PAR16 Bulbs are the smallest in diameter of all the PAR Bulbs, and the PAR20 bulb is one size larger. While a PAR20 and a PAR16 Bulb can have the same base size, the dimension of the bulb is what differs. This is important when using existing fixtures because the fit might not be the same.
What is the difference between par and BR bulbs?
PAR stands for “parabolic aluminized reflector” and is best used in settings that require a focused, narrow beam of light. Most PARs do not exceed a beam angle of 45 degrees in most cases. BR stands for “bulged reflector” and is considered a wide-angle floodlight often exceeding 100-degree beam angles.
What is Type R bulb?
Nowadays, R type bulbs have an evenly frosted coating that works to diffuse light and prevents glare. … Unlike the PAR bulb, the entire bulb envelope of R type excluding the base is constructed using blown glass. Also, the exterior part of the bulb is very smooth.
What are par lights used for?
A Par Can Light is a lamp that generates a highly directional light beam, because of this function particularity, they are the favourite of stages around the world for illuminating a single person or event. They are also the choice of aircraft, locomotives, architecture, lighthouses and cars.
How much par does a flower need?
The best light intensity for plant growth during flowering
We recommend a PAR level of 750 µmols/m2/sec for your grow room. Increasing PAR above this level does not increase the growth rate enough to justify the additional energy consumed.
What is the par value of sunlight?
Natural sunlight has a PAR value of 900-1500μMol/m2/s when the sun is directly overhead. For a grow light to be effective, it should have PAR values of 500-1500 μMol/m2/s.
What is the difference between par 38 and BR40?
PAR38 is a large reflector lamp with focused light. … The difference between a flood PAR38 and a BR40 is the cut off of light pattern. The flood PAR38 may provide a wide beam angle but not nearly as wide as a BR40 and also with a much more defined area of lighting.
What is a par 38?
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.
Are PAR30 and BR30 interchangeable?
The number following the letters in a recessed light bulb indicates size: it’s the diameter of the light bulb in eighths of an inch. So, a BR30 is 30/8 inches, or three and 3/4 inches. An MR11 is 11/8 inches. So, you can swap out a PAR30 for an R30 or a BR30 – they are all the same size.
What is a par 16 light bulb?
Parabolic aluminized reflector (PAR) 16 bulbs control light more precisely. They produce about four times the concentrated light intensity of general service A shape incandescents, and are used in recessed and track lighting. Like all light bulbs, the 16 value represents the diameter of the bulb in 1⁄8 of an inch.
What does PAR30LN mean?
Showing 1-3 of 3 answers. PAR30L and PAR30LN are the same size, the “N” denotes narrow beam, typically PAR30L is 40 degrees, and “N” is 25 degrees. Duane Scaggs.
What is E26 base?
The term E26 refers to a light bulb’s cap or base – the bulb component that allows for both electrical and mechanical contact. The letter “E” in E26 refers to Edison Screw, the most standard of lamp bases, while the numerical “26” refers to its diameter in millimeters (approximately 1 inch).