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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
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.
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 ceilingb. TP(a) diffusers can be used without restrictionc. 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.
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.
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.
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
Kosnic KLED30PNL-W40 LED
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 industrial luminaires, we also list:
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.
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.
*A very small number of large heavy items may attract an additional pallet charge to certain areas. This charge is calculated based on the overall order value and the delivery postcode area. Depending on your area, there will usually be a carriage paid order value threshold where FREE delivery can still be attained. Same Day Despatch On In-Stock Items:
We despatch in-stock items on the same working day when they are ordered before Noon GMT.
If You Have A Deadline:
Out of stock items can take up to the recommended Delivery Time which you can find on every product page, we will notify you if they are likely to take any longer than this. If you have a deadline then please feel free to contact us by email or phone. We would like to work with you to arrange a better suited delivery time or date.
Next Working Day:
All in stock items are despatched via traceable and insured carriers on a next day service. If there are items which state a longer delivery time then please contact us as we can arrange a next day on most items at an additional cost where applicable.
NON Stock items:
Any items that are not stock items will be ordered and sent directly from suppliers, all manufactures we use are highly recommended, also despatched via traceable and insured carriers. These items may take longer than the expected delivery time. We will notify you in advance if this is likely to happen.
Any items being returned as damaged in transit, requiring replacement or refund, should notify us either verbally or in writing within 48 hours of delivery, must be accompanied by clear photographs showing both the packaging - particularly any damage to the packaging - and also the damaged item(s). The correct paperwork can then be sent to us. The photographs will ensure that replacement or refund can then be processed with the minimum of delay.
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