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The LED Authority

Philips 42 Watt, 4-Pin Cool White Long Triple Twin Tube CFL Bulb

SKU: 268763 | Ordering Code: PL-T 42W/41/4P/ALTO (4-Pin)

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Product Highlights

  • Estimated life of 11 years based on 3 hours use per day

Lighting Facts Per Bulb

Brightness 2720 lumens
Estimated Yearly Energy Cost $5.06
Based on 3 hrs/day, 11¢/kWh
Cost depends on rates and use
Based on 3 hrs/day11 years
Light Appearance
4100 K
Energy Used42 watts

Philips brand 42 Watt plug-in compact fluorescent bulb with GX24q-4 base.  ALTO technology uses less mercury for an environmentally safer lamp.

  • Cool white color very popular with many businesses

  • Performance - well known brand name product at competitive price

Full Specs


Philips Lighting

Energy Used

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


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

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
Triple Twin Tube

Bulb Color

The color of the light produced by a bulb
Bulb Color
Cool White


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.

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)

Brightness (Lumens)

A rating of the initial 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)

Bulb Technology

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

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)

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)

Contains Mercury (Hg)

Contains some level of the element Mercury. Typically, bulbs containing Mercury display the symbol 'Hg'.
Contains Mercury (Hg)


A General Electric brand-specific product number for an equivalent item and is provided for the purpose of cross-referencing.
97636 - F42TBX/841/A/ECO

Osram Sylvania

An Osram Sylvania brand-specific product number for an equivalent item and is provided for the purpose of cross-referencing.
Osram Sylvania
20890 - CF42DT/E/IN/841
Customers Also Viewed
Customer Reviews

Buy for quality and price


Used outdoors in seven downward facing fixtures. Bulbs last for a long time. We run them for about eight hours per day, 365 days per year. I believe I have replaced four bulbs in five years.


Port St Lucie Florida


42 Watt, 4-Pin Cool White Long Triple Twin Tube CFL Bulb

5.0 1


Q & A
what is the incandescent watt comprable or what is the output in lumens


A 42 watt plug in lamp would be closest to a 200 watt incandescent bulb.