1. Version One LED Lamps & Systems, Sept 2010 Philips MASTER LED Knowledge Document Set Ref.TitleDatedApplies to KD01Amoeba ExplainedW2 2010MR16 4W, 7W, 10W KD02Dimming Mains Voltage LampsW2 2010All MV Dimmable KD03Dimming Low Voltage LampsW2 2010MR16 4W, 7W, 10W KD04Enhanced Red EffectW2 2010GU10 PF, Novallure, and 250lm/470lm Bulb KD05Active CoolingW1 2010MR16 7W & 10W

2. Knowledge Doc Set v1, Philips LED Lamps & Systems Mains Voltage lamps operate on standard Alternating Current (AC) power supply, with the waveform below left. Dimmers cause a reduction in light output by reducing the total power delivered to the lamps, bytrimming a section of waveform. Trimming is either done on the leading edge or the trailing edge of a waveform, and dimmers are designated by these two types. They can also sometimes be classified by the type of load they are designed to dim: So all dimmer types are suited to R type loads, but specific dimmers are required for Low Voltage applications. Knowledge Document KD02: Dimming Mains Voltage Lamps Dimmer selection and behaviour when used with Philips MASTER LED lamps How Dimmers Work Leading Edge Trailing Edge Load Type RLad Type CLoad Type L Eg. Mains Voltage Halogen or GLS Lamps Low Voltage with Electronic Transformer Low Voltage with Magnetic Transformer Leading Edge Dimmer RX RLXX Trailing Edge Dimmer RCXX Either Trailing or Leading Edge RLCXXX Increasing Cost $$$ Decreasing # of Installations

3. Knowledge Doc Set v1, Philips LED Lamps & Systems Choosing the Right Dimmer However, LED lamps are not a pure R type load, and the large variation in dimmer types and designs from different manufacturers means not all dimmers can be used with LED lamps. Philips is an industry leader on designing driver electronics that ensure best-in-class dimmer compatibility. Currently, Philips LED lamps work best with R & RL type dimmers, while installation with RC & RLC type dimmers is not recommended. Common phenomena when connecting LED lamps with the wrong type of dimmer are: Flickering of the light in certain dimmer positions Audible noise emitted from the dimmer unit Light level is not dim enough even in lowest dimmer position Philips knows the dimmer market and ensures there are available dimmer options in your country that offer exceptional dimmer performance. Knowledge Document KD02: Dimming Mains Voltage Lamps Dimmer selection and behaviour when used with Philips MASTER LED lamps

4. Knowledge Doc Set v1, Philips LED Lamps & Systems The complexity of LED lamp electronics mean that dimming behavior may not be intuitive in some cases. The following are known phenomena when using Philips LED lamps with certain dimmers. The relationship between the dimmer knob position and the light output, during turning, may differ when increasing the light level than when reducing the light level. This is due to the LED lamp requiring a certain level of activation power to switch on. A desired dimming level may be more easily achieved when dimming down than dimming up from lowest dimmer position. Depending on the dimmer type, the dimmer may offer the best minimum light level (when the dimmer is in the lowest position) with only one or two lamps. Additional lamps on a single dimmer can cause the minimum light level to increase. Therefore, for applications where very dim light is required, such as ambience setting, it is better to have a lower number of lamps in the system. Assymetrical Dimming Curves Dimmest Light Achieved with Fewest Lamps Max Light Level Same Good Dimming Level Worse Dimming Level One Lamp Dimmer at Max Dimmer at Min Five Lamps Knowledge Document KD02: Dimming Mains Voltage Lamps Dimmer selection and behaviour when used with Philips MASTER LED lamps

5. Knowledge Doc Set v1, Philips LED Lamps & Systems Despite the great energy saving offered by LED Lamps, dimmers cannot be overloaded with too many low- power lamps at once. The Philips Rule of Thumb is the 10% Rule: The LED Lamp loading limit is defined as the Max Dimmer Rating * 10% For example, the limit for a MASTER LEDspot GU10 7W, used with a Niko 09-013 Dimmer is determined as follows: How Many Lamps per Dimmer? Mains Voltage Lamps What About Specialist Dimmers? Dimmer Rating * 10% = 300W * 10% = 30W 1 Lamp = 7W OK 2 Lamps = 14W OK 3 Lamps = 21W OK 4 Lamps = 28W OK 5 Lamp = 35W NO Apart from the phase cutting (mainstream) dimmers, there are also few types of special dimmers available in the market: Sinus dimmers: Adjust the amplitude of the AC mains voltage, used in theatres 1-10 V dimming interface: Analog means of driving a dimming input on an electronic driver DALI: Digital communication for professional (office) lighting DMX512 (+RDM): High speed communication bus for dynamic (entertainment) lighting Wireless remote controls:Based on IR (infra-red) or RF (radio frequency), many protocols (e.g. RC5, Zigbee, Z-wave,...) Our dimmable LED lamps are not compatible with all above special dimmers !!! 4 Lamps Max Knowledge Document KD02: Dimming Mains Voltage Lamps Dimmer selection and behaviour when used with Philips MASTER LED lamps

6. Knowledge Doc Set v1, Philips LED Lamps & Systems Max loading for a Low Voltage LED lamp is different: The Philips MASTER LEDspot MR16 should be considered by its Halogen Equivalent, when determining how many lamps can be added to a system Then, the following mehod should be applied: ( ) Transformer BRANCH Max SYSTEM Max Dimmer Rating Equivalent Halogen ( ) Transformer Rating Equivalent Halogen 7W MasterLED MR16 (= 35W Halogen) 200Wmax Dimmer 150VAmax Transformer 200 / 35 = 5.7 5 lamps in system 150 / 35 = 4.3 4 lamps per trafo BRANCH Max SYSTEM Max Branch Max not reached, but additional MR16 would exceed System Max EXAMPLE How Many Lamps per Dimmer? Low Voltage Lamps (MR16, MR11) 1.Determine the max loading of both your transformer(s) and your dimmer: either in Watts (W) or Volt-Amps (VA). 2.Use the ratios below to determine a System Max andBranch Max 3.Limit total lamps you can install by System Max... 4.…and ensure transformer load is sufficient to allow for each individual Branch Knowledge Document KD03: Dimming Low Voltage Lamps Dimmer selection and behaviour for Philips MR16 7W & 10W (W2 2010 version)

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