Solite have prepared the following technical information for our customers:

Ballast and Choke Comparison

Are you undecided whether to use switch start chokes or high frequency ballasts? We have created a simple table comparing the advantages and disadvantages of each technology.

Feature Choke HF Ballast
Size and Weight Generally small and heavier Generally larger and lighter
Robustness More robust to extreme environmental situations. A choke can operate at higher temperatures More vulnerable to extreme situations
Power Factor Correction (PF) To improve the current waveform and reduce mains distortion it is necessary to add a capacitor. Without a capacitor PF can be as low as 0.4 Power factor correction is normally built into the HF ballast. Our warm start ballasts will have a PF of >0.95
Power Consumption Total circuit watts will be higher due to losses in the choke and higher lamp power levels Total circuit watts are lower under high frequency operation. For example total circuit watts for a 28w 2D lamp is only 29 watts
Starter A starter is required which has to be replaced periodically No replaceable starter is required in a HF circuit
Lamp Flicker Operation Operating at 50Hz lamp flicker can be perceptible No lamp flicker is perceptible at 30kHz
Noise Audible noise can occur Silent operation
Light Output Light output will vary as supply voltage increases/decreases Light output will not vary across a wide operating voltage range typically 198-264v
Running Costs Higher due to higher power consumption and the more frequent lamp replacement Lower due to lower power consumption and longer lamp life
Lamp Life Lamp life is affected by switching cycles Lamp life can be extended by up to 50% due in the main to soft starting technology and more precise control
Operation at End of Lamp Life Lamp will continue to flicker until replaced and the circuit may be damaged. Failed lamps not replaced can represent a fire risk A defective lamp will be switched off automatically and the ballast will go into standby
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ISO Standards

We have made it as easy as possible to find out which of our fittings meet each ISO standard. We have also organised a comparison table for all worldwide equivalent ISO standards.

National and International Standards Comparison Chart

Country USA EU ISO France Germany Australia
Standard 209D 209E GGMP BSEN 14644-1 BS5295 AFNOR X44101 VD I.2083.3 AS 1386
Date of Issue 1998 1992 1997 1999 1989 1981 1993 1989
1 M1.5 3 C 1 0.035
10 M2.5 4 D 2 0.35
100 M3.5 A & B 5 E, F 4,000 3 3.5
1,000 M4.5 6 G, H 4 35
10,000 M5.5 C 7 J 400,000 5 350
100,000 M6.5 D 8 K 4,000,000 6 3,500

Luminaire Range to Suit Clean Room Standard

ISO Standard Omega IP66 Sigma IP20 Lambda IP65/65 Kappa IP65/65 Zeta IP65 Epsilon IP65/54 Tau IP65/54 Gamma IP65/54 Mu IP65/54 Delta IP65 Alpha IP54
3 * *
4 * *
5 * * * * *
6 * * * * * * * *
7 * * * * * * * * *
8 * * * * * * * * *

Luminaire Range

Ceiling Type Omega IP66 Sigma IP20 Lambda IP65/65 Kappa IP65/65 Zeta IP65 Epsilon IP65/54 Tau IP65/54 Gamma IP65/54 Mu IP65/54 Delta IP65 Alpha IP54

Recessed Mounted

Plaster/Panel * * * *
Grid * * *
Walk On * *
Wall *

Surface Mounted

Plaster/Panel * *
Grid *
Wall * *
Cornice *
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Understanding IP Protection

Are you unsure what the IP rating of our fittings means? We have entered all of the information you need into a couple of simple tables.

IP Explanation and Ratings
Luminaires are classified in accordance with the requirements of EN60529 and EN60598 regarding their ability to prevent the ingress of solids or liquids. The classification system utilizes the letters "IP" ("Ingress Protection") followed by two digits.

Degrees of Protection - First Digit
The first digit of the IP code indicates the degree that persons are protected against contact with live parts and the degree that equipment is protected against solid foreign bodies intruding into an enclosure.

Degrees of Protection - Second Digit
The second digit indicates the degree of protection of the equipment inside the enclosure against the harmful entry of various forms of moisture (e.g. dripping, spraying, submersion, etc.).

The IP Code Symbols
The table below illustrates the use of special symbols in the IP classification system. These symbols should be placed on equipment to illustrate the IP protection provided. An "X" is used for one of the digits if there is only one class of protection; i.e. IPX4 which addresses moisture resistance only.

First Characteristic Degree of Protection
Numeral Symbol Short Description Details
0 No protection No special protection
1 Protected against solid objects greater than 50mm A large surface of the body, such as a hand (but no protection against deliberate access) Solid objects exceeding 50mm in diameter
2 Protected against solid objects greater than 12mm Fingers or similar objects not exceeding 80mm in length. Solid objects exceeding 12mm in diameter
3 Protected against solid objects greater than 2.5mm Tools, wires etc. of diameter thickness greater than 2.5mm. Solid objects exceeding 2.5mm in diameter
4 Projected against solid objects greater than 1.0mm Wires or strips of thickness greater than 1.0mm. Solid objects exceeding 1.0mm in diameter
5 IP5x Dust protected Ingress of dust is not totally prevented but dust does not enter in sufficient quantity to interfere with satisfactory operation of the equipment
6 IP6x Dust tight No ingress of dust
First Characteristic Degree of Protection
Numeral Symbol Short Description Details
0 No protection No special protection
1 IPx1 Protected against dripping water Dripping water (vertically falling drops) shall have no harmful effect
2 Protected against dripping water when tilted up to 15° Vertically dripping water shall have no harmful effect when the enclosure is tilted at any angle up to 15° from its normal position
3 IPx3 Protected against spraying water Water falling as a spray at an angle up to 60° from the vertical shall have no harmful effect
4 IPx4 Protected against splashing water Water splashed against the enclosure from any direction shall have no harmful effect
5 IPx5 Protected against water jets Water projected by a nozzle against the enclosure from any direction shall have no harmful effect
6 Protected against heavy seas Water from heavy seas or water projected in powerful jets shall not enter the enclosure in harmful quantities
7 IPx7 Protected against the effects of immersion Ingress of water in a harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time
8 IPx8 Protected against submersion The equipment is suitable for continuous submersion in water under conditions which shall be specified by the manufacturer.
Note: This will normally mean that the equipment is hermetically sealed. However with certain types of equipment it can mean that water can enter but only in such a manner that it produces no harmful effects.
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Description Suffixes

When ordering our products we have a series of suffixes to combine with all of our product codes, here you can find out what each of them means.

Type Number Description
Each Solite luminaire is identified by a unique reference which indicates the model type and size of fitting.

Epsilon fitting 600 x 1200 is identified as Epsilon42
Lambda fitting 300 x 1800 is identified as Lambda61

In addition there are suffixes which identify more specific information such as:

  • 2/??W two tubes (wattage tba)
  • 3/??W three tubes (wattage tba)
  • 4/??W four tubes (wattage tba)
  • ?/18W indicates number of tubes with specific wattage (i.e.18w)
  • EM indicates that an emergency module is required.
  • RA indicates rear access capability - maintenance access for luminaire is required from above the ceiling.
  • AHF indicates rear access though front - the luminaire is fitted with a rear access hatch, removable from inside the luminaire to permit access to factory plant directly above the luminaire.
  • PP indicates the luminaire requires a prismatic polycarbonate diffuser.
  • UV protective UV film required.
  • CTG indicates that a clear toughened glass diffuser is required.
  • CAT indicates cat2 louvre with clear polycarbonate cover.

Order Example:
If you require an Epsilon fitting 300mm x 1200mm with two 28w tubes with a prismatic polycarbonate diffuser and emergency module.

Your order reference would be:
Epsilon41 T2/28WT5/PP+EM

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We have organised all of the fluorescent lamps we use in our fittings into a simple table format showing lumens, wattages and dimensions.

A range of fluorescent tubes for all applications (usually T5, T8 and TCL) are used in Solite fittings with colour temperatures to suit customer requirements. For special applications we can also offer a range of protected lamps. (See below)

Typical UK fluorescent Lamp Sizes with Approx. Lumin Outputs

26Lamp Watts Length (mm) Approx Lumens Tube Diameter (mm)
TL5/HE 14 549 1200 16
TL5/HE 21 849 1900 16
TL5/HO 24 549 1750 16
TL5/HE 28 1149 2600 16
TL5/HE 35 1449 3300 16
TL5/HO 39 849 3100 16
TL5/HO 54 1149 4450 16
TL5/HO 49 1449 4300 16
TL5/HO 80 1449 6150 16
T8 15 438 1000 26
T8 18 590 1350 26
T8 30 895 2400 26
T8 38 1047 3350 26
T8 36 1200 3350 26
T8 58 1500 5200 26
T8 70 1800 6200 26

Special Lamps
Class 1 "Safe-T-Coat" fluorescent lamp. A thin walled ultra violet stabilised thermo-plastic sleeving is placed around the tube to contain broken glass and toxic substances in the event of tube breakage or implosion.
Class 2 "Shattershield" fluorescent lamps, incorporating a protective sleeve but still permits possible leakage after tube breakage.
Class 1 "Safe-T-Filter" lamps for light sensitive materials protecting against frequencies of between 500 and 610 nanometres.

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