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Lamp
Description Codes
Glossary of Terms
The lamp description codes used to identify Venture lamps appear below. The example that follows shows how to interpret these codes to identify your lamp type.
Example:
Lamp type: 150 watt Uni-Form® pulse start lamp, open rated, universal, 70 CRI
Description Code: MP150W/C/U/ED28/PS/3K
Explanation:
| MP | 150W | /C | /U | /ED28 | /PS | /3K |
| Shrouded arc tube for open fixtures | Numbers to designate lamp wattage | Coated outer jacket | Burning position, indicates Universal | Bulb shape/ diameter when a "standard" envelope is not used. | Pulse start lamp | 3200 Kelvin color |
LAMP DESCRIPTION CODES
| / BD | Lamps designed for base down operating position |
| / BU | Lamps designed for a base up operating position |
| / C | Lamps with a coated outer jacket |
| / DAY | Daylight color lamp - also see /5K |
| DC | Direct Current |
| DE | Double end lamp - base at either end |
| / ED## | Bulb shape /diameter when a "standard" envelope is not used (i.e. /ED28) |
| / ER | Lamps designed to operate on special regulated lag ballasts with starting pulses |
| / EURO | Lamps designed to run on controlled current reactor ballasts with an ignitor usually in Europe |
| / FL | Flood beam - now replaced with beam width in degrees, i.e. /35, /55 |
| / HBD | Horizontal to base down operating position |
| / HBU | Horizontal to base up operating position |
| HIE | E27 and E40 based metal halide lamp |
| / IS | Instant Re-start lamp |
| / LU | White-Lux® lamp - Metal halide for use in HPS fixtures |
| / MED | Medium base |
| MH | Metal halide |
| /MOG | Mogul base |
| MP | Lamps with a shrouded arc tube designed for open fixtures |
| MS | High output metal halide usually with a dedicated burning position |
| /O | Open fixture design for E27 and E40 based lamps |
| / PAR## | Parabolic reflector lamp - the number (##) is lamp diameter in 1/8" |
| /PS | Pulse start lamp |
| / QS | Quick Re-start lamp |
| / R40 | Reflector lamp - 40 is lamp diameter in 1/8" |
| / SP | Spot beam - now replaced with beam width in degrees - (i.e. /20) |
| / U | Universal operating burning position |
| /UVS | UV Shield lamps |
| / V | Lamps designed to be burned in the vertical position - formerly /BU/BD |
| ### | Numbers in lamp code designate lamp wattage (i.e. the 400 in MH 400/U is for wattage) |
| / ## | Reflector lamps to show beam width - ## is width in degrees at 50% of center beam cp |
| / 27K | 2700 Kelvin color |
| / 3K | 3200 Kelvin color |
| / 5K | 5200- 5500 Kelvin color |
Average Life: A value for life expectancy of a lamp
Ballast: A device that provides the proper voltage and current to start and operate the lamp; acts as a current regulator and limiter and allows the arc discharge to sustain longer
Base: The end of the lamp that inserts into the lamp socket
Bulb: The outer jacket or envelope of a lamp
Burning Position: The position in which lamps are designed to be operated; burning lamps in positions not specified can severely reduce all aspects of lamp performance and may lead to non-passive failures; unless a metal halide lamp is designated universal burn, it should always be burned in its designed position
Chromaticity: The quality of color characterized by its dominant or complementary wavelength and purity taken together
Cold Start Time: The amount of time from lamp start-up to full light output
Color Temperature: Correlated Color Temperature (CCT); the "color" of the light given off by a lamp
Color Uniformity: Consistency of color from lamp to lamp.
CRI: Color Rendering Index; a quality of the light; a measure of the lamp’s ability to "render" colors accurately
Controlled Current Reactor Ballast: A reactor ballast with ignitor starting; uses 277 volt circuits; reduced current crest factor lowers ballast losses and improves lumen maintenance
Current Crest Factor: The ratio of the peak current to the average current delivered to a lamp during operation by the ballast; lower current crest factor contributes to increased lumen maintenance due to less stress on lamp electrodes from higher currents
CWA Ballast: A regulator ballast with an autotransformer, also known as a peaked lead ballast
Economic Life: The number of hours a group of lamps will burn before it is economically and aesthetically advisable to group relamp
Efficacy: Lumens per watt
Fixture Requirements: The type of fixture a lamp requires, enclosed or open rated
Formed Body Arc Tube: Arc tube formed by Venture’s quartz sculpting process; has 1/3 less quartz mass than standard arc tubes; precisely reproducible spherical arc tube chamber shape follows arc stream, 3rd starter electrode eliminated
Group Relamping: The cost-effective method to replace metal halide lamps, by replacing all lamps at one time
HID: High Intensity Discharge lamps; includes metal halide, mercury vapor, high pressure sodium and low pressure sodium
Hot Re-Start Time: The amount of time from a momentary power interruption to return of full light output
Ignitor: An add–on unit between the ballast and the lamp that provides a high voltage pulse across the two main electrodes in the lamp to start the discharge
Ignitor CWA Ballast: A CWA ballast using ignitor starting, resulting in ballasts with improved current crest factor.
Initial Lumens: A value that reflects light output based on photometry results after 100 hours of operation using controlled system characteristics.
Lamp Voltage: The voltage at which lamps operate when they are fully warmed up. This voltage may vary according to total system characteristics
Lamp Wattage: The power consumption of a lamp after warm up, NOT including ballast losses
LCL: The Light Center Length for HID lamps. This value is the distance in inches from the center of the arc discharge to a specified reference point on the lamp, usually the base.
Lighting Design Lumens (LDL): The number of lumens at 2,000 hours of operation.
Lumen Maintenance: The amount of lumens provided by the lamp at a given point or percentage in its life
Lumens: A measurement of light output ; takes into account the eye sensitivity curve of humans and gives more weight to the yellow-green part of the light spectrum that is most effective for human vision
Lumens Per Watt: Lumen (light) output divided by lamp watts consumed (i.e. amount of electricity used); also known as efficacy.
Mean Lumens: Amount of light output at 40% of lamp life
MOL: The Maximum Overall Length from the tip of the base to the top of the glass bulb
Nominal Color Temperature: The correlated color temperature of a light source in Kelvin
Operating Current: Current in Amps consumed by a lamp at rated watts
Operating Voltage: Voltage at rated watts, after lamp fully warms up
POMB: Position Oriented Mogul Base lamps - for horizontal burning positions
Product Number: A number assigned to an individual product
Pulse Start Lamp: Uses ballasts with ignitor starting; eliminates the need for third starter electrode.
Rated Life: The number of operating hours at which 50% of lamps initially started will still be operating
Reactor ballast: Also referred to as a lag ballast; uses a coil of wire wound around an iron core connected in series with the lamp.
Regulated lag ballast: Offers the greatest level of control over lamp wattage fluctuations as a result of input line voltage variation; is larger and heavier than either the controlled current reactor or ignitor CWA
Shroud: A quartz cylinder surrounding the arc tube that protects against pieces of hot quartz breaking the glass bulb in the unlikely event of a non-passive lamp failure; makes possible the use of open fixtures
Spectral Distribution: The intensity of spectral energy in wavelengths emitted by a light source
Warm Up Time: The amount of time elapsed from turning on the lamp to 90% light output
Watts: A measure of energy being used or emitted by a lamp each second. Actual lamp wattage may vary, depending on ballast characteristics. For total system watts, add nominal ballast watts.