# Is Lux The Same As Par?

## How many Lux is too bright?

Earlier it was common with light levels in the range 100 – 300 lux for normal activities.

Today the light level is more common in the range 500 – 1000 lux – depending on activity.

For precision and detailed works, the light level may even approach 1500 – 2000 lux..

## What is the difference between par 30 and par 38?

PAR20: 20 denotes, the exact measurement from brim to brim of LED lights, that is to say, 20/8 inch in diameter, approximately 64mm; PAR30 is standing for 30 denotes, 30/8 inch in length near to 95mm, PAR38. 38 denotes, 38/8 inch in length, is equal to 120mm.

## How do you convert Ppfd to par?

PPFD is the correct method to express the intensity of PAR (400-700nm) light that is instantaneously landing on a single spot in a plant canopy. The correct instrument to measure PPFD is called a quantum meter; like the LBGQM from Hydrofarm. Multiply the Lux by the conversion factor to get PPFD.

## What is a par meter?

To help growers determine the right position for their light, lighting manufactures provide a recommended hanging height for the light, the area the light will cover at the recommended height, and the photosynthetically active radiation (PAR) value for the light. …

## How is Par Value calculated?

PAR is measured by the amount of micro moles of light per square meter per second. Although PAR is a key measurement, it only tells one part of the story. There are many areas within the PAR scale which plants absorb only in small quantities, such as in the green range (560 nm).

## What is par in lighting?

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). PAR is a much used (and often misused) term related to horticulture lighting. PAR is NOT a measurement or “metric” like feet, inches or kilos.

## What is Lux in LED light?

Lux is used to measure the amount of light output in a given area. One lux is equal to one lumen per square meter. It enables us to measure the total “amount” of visible light present and the intensity of the illumination on a surface.

## 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.

## Why are par meters so expensive?

All PAR meters are made with a sensor that counts individual photons (“particles” of light). … Better filters and sensors typically cost more and so increase the price of the PAR meter. Because no filter material or sensor is perfect, these meters are calibrated to “average” light spectra, such as natural sunlight.

## What do you need to be careful for when using PAR cans?

One of the things you need to be careful of when using par 16s is that often the globes that are installed are very cheap and don’t offer the smoothest of light sources, too.

## What is par efficiency?

Photosynthetically Active Radiation, or PAR, is the band of wavelengths between 400nm and 700nm. Plants use this range of electromagnetic radiation to perform photosynthesis, but most efficiently absorb wavelengths in the mid-400s (blue) and mid-600s (red).

## What does 1 lux look like?

One lux (1 lux) is defined as being equivalent to one lumen spread over an area of one square metre. To put it another way: … So 1,000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance level of 1000 lux.

## Can you convert lux to par?

You cannot convert lux to par, you can convert lux to foot candles.

## How much par do I need for veg?

The best light intensity for plant growth during vegging The PAR intensity levels required during vegging growth are about half of the normal flowering requirements. We recommend a PAR level of 300 – 400 µmols/m2/sec for your grow room.

## What is the par value of sunlight?

900-1500μMol/m2/sNatural 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.

## How many Lux is dangerous?

To expand on this, direct sunlight is 32,000 to 130,000 lux, according to Wikipedia. Staring at the sun can cause eye and brain damage because it overloads your retina and causes it to release chemicals which can damage surrounding tissue (nerves). Indirect sunlight is 10,000 to 25,000 lux, which is safe.