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220 Watt BT28 High Pressure Sodium Bulb

SKU: 391953 | Ordering Code: C220S65/Retrolux

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Product Details

Brand

Philips

Energy Used

A rating, expressed in watts, to indicate the rate at which a lamp consumes energy. Also known as wattage value.
 
Energy Used
220 Watts

Bulb Shape

The description of the general appearance of a lamp/bulb consists of a letter(s) followed by a number. The letter indicates the shape of the bulb and the number relates to the diameter of the bulb in eighths of an inch. For example, a common household bulb is the A-19. The bulb is "A" shape and the diameter would be nineteen 8ths of an inch, or 2 3/8".
 
Bulb Shape
BT-28

Base

The end (or ends) of the lamp that fits into the socket.
 
Base
Mogul (E39)

Diameter (in)

Light bulbs: a measurement of a bulb's width taken at the widest point of the bulb. Fixtures: the measurement across the widest point of a circular fixture.
 
Diameter (in)
3.5

Length (in)

Also referred to as "Maximum Overall Length" (MOL). For light bulbs, it measures the length of a light bulb, from the top of the bulb to the bottom of the base or pins and is typically expressed in inches. For light fixtures and ballasts, it applies to the total horizontal length of the item.
 
Length (in)
8.31

Average Rated Life (hr)

A measurement of the average length of time, between first use and the point when 50% of the lamps tested have stopped functioning, , using an operating cycle of 3 hours on, 20 minutes off.
 
Average Rated Life (hr)
24000

Brightness (Lumens)

A rating of the inital light output of a bulb, rated after 100 hrs of operation. Lumens are a measure of how much light falls on one square foot of area, one foot away from the light source.
 
Brightness (Lumens)
22500

CRI

Color Rendering Index is an international system used to rate a lamp's ability to render object colors. The higher the CRI (based upon a 0-100 scale) the richer and more accurately colors generally appear. CRI differences among lamps are not usually visible to the eye unless the difference is more than 3-5 points.
 
CRI
25

Color Temperature (Kelvin)

An expression of the hue of the light emitted, measured in degrees Kelvin. Usually expressed by a four digit number followed by (k), such as 2700k. Higher temperatures indicate whiter, "cooler" colors, while lower temperatures indicate yellower, "warmer" colors. Some common Kelvin temperature benchmarks are 2700k (warm white), 3500k (neutral white), 4100k (cool white), 5000k (bright white), and 6500k (daylight).
 
Color Temperature (Kelvin)
2100K

GE

A General Electric brand-specific product number for an equivalent item and is provided for the purpose of cross-referencing.
 
GE
49939 - LUH215/EZ

Osram Sylvania

An Osram Sylvania brand-specific product number for an equivalent item and is provided for the purpose of cross-referencing.
 
Osram Sylvania
67530 - ULX215

Bulb Technology

The technology implemented by the bulb, e.g. incandescent, halogen, LED
 
Bulb Technology
High Pressure Sodium

Bulb Finish

The surface finish of a bulb, which may affect the quality of the light emitted.
 
Bulb Finish
Clear
Description
 
Reviews
 
Q & A

Philips Retrolux* brand 220 Watt clear High-Pressure Sodium Conversion lamp with mogul base. Save energy by replacing 250 Watt metal Halide lamp with 220 Watt High Pressure Sodium, without having to change your fixture or ballast.

  • Operates in standard 250 Watt Metal Halide fixture

  • Performance - brand name product at a competitive price

Metal Halide (ANSI Code M58) required.  May be safely used in either open or enclosed fixtures

 
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