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Kosnic 30w ECO LED Panel 600x600mm 4000K White TPB Rated Material

Kosnic 30w ECO LED Panel 600x600mm 4000K White TPB Rated Material


The Kosnic KPNL30ECO-W40 LED panel a general use panel made with Tpb material and offers Edge-Lit technology to achieve constant light across the surface of the luminaire this is a Neutral White with a colour temperature of 4000K

The panels are supplied with a standard driver and suitable General use

The Kosnic KPNL30ECO-W40 is the Budget version of the Kosnic range  

The Kosnic KPNL30ECO-W40 has a 3 year manufacturer's warranty

Estimated Delivery

Next working day
Excl. VAT: £23.06 Incl. VAT: £27.67
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The Kosnic  KPNL30ECO-W40 LED panel offers Edge-Lit technology to achieve constant light across the surface of the luminaire and is an easy-to-retrofit replacement for in-lay ceiling tile fittings. The standard panels are suitable for amenity lighting of corridors, stairwells, store rooms, transit areas and other utility spaces.

  • Class III panel supplied with separate independent class II LED driver
  • Save up to 50% energy usage compared to traditional fluorescent fittings
  • Compatible with the CEW030LIL58-130N emergency module
  • Optional surface mounting kit available
  • High lumen output
  • Long life of 40,000h
  • Slim profile design
  • Instant start
  • Negligible UV output
  • Mercury free


  • EMERGENCY Plug-in emergency conversion pack, so any fitting can be converted to emergency later if required. Emergency conversion packs to be ordered separately, as listed below.


  • A surface mounting kit is available


  • A wire suspension kit is available


What Is a Tpa Rated material

Ceilings of rooms and circulation spaces (but not including protected stairways) may incorporate thermoplastic lighting diffusers if ALL of the following provisions are observed:

a. The surfaces of the void space above the suspended ceiling comply with the general provisions that apply to the space below the suspended ceiling
b. TP(a) diffusers can be used without restriction
c. TP(b) diffusers are restricted as detailed below.

In other words, there is no provision in the UK Building Regulations for the use of non-rated thermoplastic panels. The situation is confused, however, by the number of luminaires currently available that use non-rated thermoplastic diffusers. Lux spoke to the Lighting Industry Association, the largest trade association in Europe, who told us:

‘The LIA position is that it is not illegal to sell a panel that is neither TP(a) nor TP(b) rated as long as it is clearly stated in the installation instructions that it cannot be used if it forms part of a ceiling. Panels that form part of a ceiling (ie recessed) must be either TP(a) or TP(b) rated and be installed in accordance with the Part B regulations relating to that rating.’

So this is a case of caveat emptor (buyer beware). Unless the manufacturer’s information states clearly that the luminaire being offered contains a diffuser that complies with either a TP(a) or TP(b) rating, DO NOT BUY IT.

2. TP(a) rating

Thermoplastic materials undergo specific tests to certify their ability to withstand the application of heat and fire. The requirements are established by Building Regulations Approved Document B, which sets out the fire safety of buildings. Section B2 covers internal fire spread.

TP(a) usually relates to polycarbonate diffusers with a thickness of at least 3mm. The testing procedure requires that the material self-extinguishes and any flaming and afterglow must not exceed five seconds once the source of flame is removed.

There is no restriction on the use of TP(a)-rated diffuser material.

3. TP(b) rating

TP(b) materials tend to be acrylic or polystyrene. It is a more problematic material because its use is limited by the extent of the installation. The testing for TP(b) requires a flame to be presented to the material. If the material combusts, the spread of flame must be no more than 50mm per minute – that’s 12 minutes to completely blanket a 600mm wide panel.

How the restrictions work in practice is as follows. In circulation spaces, the total area of diffuser panels must not exceed 15 per cent of the total floor area. The maximum area of one diffuser, or group of diffusers, must not exceed 5m x 5m. There must be a 3m spacing between each 5m x 5m diffuser grouping.


Maximum and minimum spacings of TP(b) diffuser panels in circulation areas

In offices and other rooms, the total area of diffuser panels must not exceed 50 per cent of the total floor space. The maximum permissible area of a single diffuser panel must not exceed 5m2. (This is a big luminaire and is most likely to occur as a rooflight detail.)

Where a conventional arrangement of luminaires is used, then either the arrangement for circulation spaces should be employed or else spacing between all luminaires should be no less than twice the diagonal distance (or diameter) of the luminaires in use.

Maximum and minimum spacings of TP(b) diffuser panels in spaces other than circulation areas

TP(b) is a problematic material because it does catch fire, albeit in a ‘controlled’ manner. The total area of 5m2, for example, could be used to apply to a linear light channel measuring 100mm wide x 50m long. The material has the potential of spreading flame along its entire length over a period of only 20 minutes per metre. In a few hours, the lighting diffuser could spread its flame the length of an office corridor. This is a worrying prospect.

For more two-minute explainers, click here.



What Is UGR19?

 UGR stands for unified glare index. It’s a numerical way of defining how bright a luminaire appears in-situ and it goes back to the earliest editions of lighting codes for interior lighting – office lighting, in particular.

In the early days of desk-top computers there was a serious problem caused by the reflections of light fittings in highly-reflective screens. This is the best-known image and was included in all editions of the lighting codes:

Of course, it didn’t take long for the screen manufacturers to make the whole issue redundant by shifting to low-reflective screens. And that, we thought, was that.

The unforeseen legacy of this was the ubiquitous Cat 2 fluorescent luminaire. Although lighting standards for offices ran to several dozen pages everyone, from specifier to manufacturer to supplier to installer, boiled all that advice and wisdom down to a single abbreviation, and Cat 2 was born.

Effectively, it meant that office lighting should be provided by luminaires with a 65deg angle cut-off. The crass use of Cat 2 as the defining feature of interior lighting so annoyed the Society of Light and Lighting (SLL) that the ‘Category’ system was abandoned in 2002 as a direct consequence of this misuse.

Let’s write that date again . . . 2002. We’ve since had two lighting codes for office environments, Lighting Guide 3 and more recently Light Guide 7.

Compliance with those codes requires a full analysis of illuminances, reflectivity, task geometries, so as to arrive at any kind of meaningful specification. But despite the changes in design requirements, and a lot of SLL foot-stamping, suppliers and installers still looked for a convenient shorthand. And finally, Cat 2 can be forgotten because we have a new one to play with: welcome UGR19.

Let’s be clear from the outset. Nothing has changed here; we’re still in a world defined by Sun headline writers. There is no such thing as a ‘UGR19-compliant’ luminaire. There are luminaires that function in such a way that they support a UGR-compliant scheme but compliance can only be proven once the ergonomic metrics of how the luminaires relate to occupancy in a real space have been established.

UGR Calculations can be made using the Relux Software, It is possible to achieve UGR19 Compliance with a standard Opal Panel if the area is small enough as your eyeline tends to be looking at the wall opposite this is why manufacturers use the term UGR19 *  this star tends to mean small offices only

IF in doubt what to use ask the Mastertrade Lighting Design Team to run a quick Relux Scheme. If you don't have the time for this stay with UGR19 Tpa Panels


 LED light panels installed in a much more modern looking office.




What is a MacAdam Ellipse & SDCM (Standard Deviation Colour)?

This is an elliptical region on the CIE chromaticity diagram that contains all the colours that are indistinguishable to the average human eye, from the colour at the centre of the ellipse. Adjacent ellipses are “just distinguishable” in terms of colour. This are used to refine the binning process of LED colours. Slight colour differences in the appearance are measured in MacAdam ellipses or steps.
Generally <4 SDMC is acceptable if you see <3  SDCM this tends to exposed LED chips on a tape where the prodcut is not diffused.

Kosnic KLED30PNL-W40 LED


LED and lifetime Example L70 B50 What is this ?           Credit to Glamox For this  Explanation

One of the benefits of the LED is its long lifetime. Because it has no movable parts or filaments that may break, LED’s can have long lifetimes.

The light output from all light sources, LED, halogen, metal halide and fluorescent decreases over time. The amount of light from the light source at a specific time in the future is referred to as the lamp lumen maintenance factor, or LLMF. The lifetime of a LED module is defined as the time it takes until its light output, or lumen maintenance, reaches 70% of the initial output. This is also called L70. In other words, the module does not die instantly as many conventional light sources do, it slowly dims down. Lighting planners take this effect into account when they dimension the lighting installation. As they want the light level to reach a minimum lux value at the end of the lifetime, they over-dimension the luminaire installation, often by using more luminaires. Therefore, the lux value in the beginning of the operating life of the lighting installation is higher than what it is at the end. The luminaire industry has standardised LED lifetime to L70 = minimum 50000 hours, which corresponds to an LLMF of 0,7 as long as the lifetime of the lighting installation is set to the same amount of hours.

The actual lifetime of a LED luminaire is important for cost savings



For some of our products, the lumen degradation is better than the industry standard. After 50,000 hours of life, not only 70% of the life remains, but 80% or even more. The LLMF is then raised to 0,8 or above and the lighting designer does not need to over-dimension the lighting installation as much. With this upgrade, up to 25% of the luminaires may be left out, depending on the ceiling type. That means lower installation costs and a lower energy bill. At the same time, the lux levels are always meeting the lighting norm requirements. 


New standards on LED lifetime
New international standards on how lifetime should be declared on LED luminaires have now been published. The standards are IEC 62717 LED-modules for general lighting – Performance requirements and IEC 62722-2-1 Particular requirements for LED luminaires.

What do the standards say?
IEC 62722 states both test method and minimum required time for testing LED lifetimes. The minimum test time is 6,000 hours where the luminous flux is recorded every 1,000 hours. These values are extrapolated using a method stated in IES TM21.

What’s new?
The lifetime for the LED module and the driver should be declared separately. If the lifetime for the driver is shorter than that of the module, a driver replacement may be necessary before the luminaire’s lifecycle is completed. This means that there cannot be a single figure declaring the total luminaire lifetime. 
A helpful metric for "median useful life" has been introduced in IEC 62717. This is the time elapsed until 50% of the LED luminaires in use reaches the stated light output, for example L80.

How Glamox lists the Lifetime for LED luminaires
The lifetime of a LED module inside a luminaire is related to the luminous flux depreciation at a given ambient temperature. L70, L80 or L90 indicates how many lumens (in percentage related to the initial lumens) that remains after end-of-life. The L-value may be explained B- and C-values. 

For all luminaires, Glamox Limited Lists:
  • The median useful life (IEC 62717) Lx B50 at  Ta.25 degrees. Lx may vary from 70 to 90 
    depending on the product and the corresponding lifetime goes up to 100,000 hours.1 
  • Lamp lumen maintenance factor (LLMF) 50,000h,  Lx B50 Ta. 25 degrees. This is a factor from 0 to 1.0. 

For industrial luminaires, we also list:

  • The median useful life (IEC 62717) Lx B50 at maximum Ta Lx may vary from 70 to 90 depending on the product and the corresponding lifetime goes up to 100,000 hours.

[1]For products designed for enclosed installation, the lifetime will be lower than that for open installations. For example, a downlight may have a lifetime of L70 - 100 000 hours at 25 deg and 75 000 hours at 35 deg (max Ta). An enclosed installation would call for a lifetime of 
75,000 hours.

B value
The failure fraction for By expresses only the gradual light output degradation as a percentage y of a number of LED modules of the same type that at their rated life designates the percentage (fraction) of failures. The value B50 indicates that the declared L-value will be achieved by minimum 50% of the LED modules and that the remaining 50% may have a lower lumen value. The value B10 means that minimum 90% of the LED modules will meet the declared L-value and only 10% will have a lower flux level. A B10 value is therefore more conservative than B50. In practical terms it means that B10 is reached at an earlier stage in the lifetime on a set of LED modules compared to B50.  Glamox Luxo uses B10 & B50 as the standard value when stating LED lifetimes.

C value
The failure fraction for Cy expresses only the abrupt light output degradation as a percentage y of a number of LED modules of the same type that at their rated life designates the percentage (fraction) of failures. A catastrophic failure is when the LED module does not emit any light. Glamox Luxo does not publish C values for our LED products.





The figure shows the two factors that affect LED luminaire lifetime – gradual degradation of the lumen output or abrupt failure of the luminaire. Source: ZVEI.

F value
The F value depicts the combined failure fraction. This is the combination of both gradual (B) and total failures (C).

Driver lifetime
The LED driver can be compared to other electronic components such as HF-ballasts for T5 lamps. The expected lifetime depends on the design itself, the used components and the temperature of these components. Glamox Luxo only uses drivers from quality suppliers. The drivers are marked with a reference temperature point, Tc where the stated temperature never should be exceeded. Often the maximum ambient temperature (Ta) of the luminaire relates to the maximum value on the Tc-point. At this Ta we declare a lifetime of minimum 50.000h with an estimated failure rate of 10%.

Why is the L-value so important?
The L-value is directly related to the maintenance factor (MF) used when making a light calculation. MF includes the following parameters: 


  • LLMF = Lamp Lumen Maintenance Factor
  • LSF = Lamp Survival Factor. The LSF factor can be ignored (set to 1,0) if the luminaires are replaced immediately after failure.
  • LMF = Luminaire Maintenance Factor. Depends on type of luminaire, how clean is the environment and finally the cleaning interval of the luminaire. Normal values for interior use are between 0,93–0,98 for clean environments.
  • RSMF = Room Surface Maintenance Factor. Depends on reflectance factors in the room, how clean is the environment and finally the cleaning interval of the room. Normal values for interior use are between 0,95–0,97 for clean environments.

LLMF is basically the same as the L-value. L80 corresponds to a LLMF of 0,8. In order to find the correct L value you must first define the correct required lifetime and the correct required ambient temperature (Ta). 

LMF and RSMF values are defined in CIE 97 and most PC based light calculation programs have tables that help you chose the correct value.

Example 1:
Recessed LED luminaire used in an office landscape. This luminaire has a lifetime of L90 = 50,000 hours at Ta 25 degrees. Environment clean, cleaning interval twice a year, reflection factors 70, 50, 20.

MF = LLMF x LSF x LMF x RSMF = 0,9*1*0,96*0,96 = 0,83

Example 2:
Recessed LED downlight used in a corridor. This luminaire has a lifetime of L80 = 50,000 hours at Ta 25 degrees. Environment clean, cleaning interval twice a year, reflection factors 70, 50, 20.

MF = LLMF x LSF x LMF x RSMF = 0,8*1*0,96*0,96 = 0,74


Manufacturer Kosnic
Material Rating TPB
Colour White
Mounting Recessed Mounted
Insulation Class Class III - Low Voltage
Colour Temperature 4000
Wattage 30
Colour Rendering 81
Width in MM 600
Rated Voltage 230V
Length in MM 600
Depth in MM 8.5
UK Delivery: Orders over £150 excluding VAT - FREE DELIVERY* Orders under £150 excluding VAT - Delivery £7.50 excl VAT

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