Westcott 0051 Spiderlite TD5 50 Watt Lamp Pack (Black)

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Price: $159.90    

Product Feature

• Illuminates your surroundings
• Compact fluorescent lamp
• Long lasting yet low energy consumption

Product Description

Simulate the natural look of window-light with this balanced fluorescent lamp. With the equivalent output, this lamp is powerful yet stays cool when working in tight conditions.

Westcott 0051 Spiderlite TD5 50 Watt Lamp Pack (Black) Review

Following several other reviews regarding the light output I did my own simple test comparing Flashpoint and Westcott Daylight balanced (5500K) flourecent light bulbs.
I compered(price are per 5 bulbs set including discounts, as of today)

1. Flashpoint 5500K 30W (FPFB30) - $32.45
2. Flashpoint 5500K 45W (FPFB45) - $36.95
3. Westcott 27W (WESLT275) - $94
4. Westcott 50W - 4x50W, 1x20W (WE50WFL5P) - $146.90

I used a TD5 with a Westcott 36" x 48" Bruce Dorn Shallow Soft Box (no inner buffle)
I measured about 12 feet from the light source using Sekonic 358, (ball inside) in a dark room.
I tested it twice, both time with ISO 1000 , first time with fixed aperture 2.0 and second with fixed 1/60 speed.
I measured the light 5 times, for 1-5 light bulbs.
I'm not sure how much this help but here are my results, as I tested them:

ISO 1000, Fixed Apreture 2.0:
1 bulb
Westcott 27W - 1/30
Flashpoint 30W - 1/30
Flashpoint 45W - 1/30
Westcott 50W - 1/15

2 bulbs
Westcott 27W - 1/60
Flashpoint 30W - 1/60
Flashpoint 45W - 1/80
Westcott 50W - 1/100

3 bulbs
Westcott 27W - 1/100
Flashpoint 30W - 1/80
Flashpoint 45W - 1/100-125
Westcott 50W - 1/160

4 bulbs
Westcott 27W - 1/125
Flashpoint 30W - 1/125
Flashpoint 45W - 1/160
Westcott 50W - 1/250

5 bulbs
Westcott 27W - 1/160
Flashpoint 30W - 1/160
Flashpoint 45W - 1/160-200
Westcott 50W - 1/320

ISO 1000, Fixed Speed 1/60:

1 bulb
Westcott 27W - 1.4
Flashpoint 30W - 1.3
Flashpoint 45W - 1.4
Westcott 50W - 1.1

2 bulbs
Westcott 27W - 2.0
Flashpoint 30W - 1.8
Flashpoint 45W - 2.0-2.2
Westcott 50W - 2.5

3 bulbs
Westcott 27W - 2.5
Flashpoint 30W - 2.2
Flashpoint 45W - 2.5
Westcott 50W - 2.8

4 bulbs
Westcott 27W - 2.8
Flashpoint 30W - 2.8
Flashpoint 45W - 3.2
Westcott 50W - 4.0

5 bulbs
Westcott 27W - 3.2
Flashpoint 30W - 3.2
Flashpoint 45W - 3.2-3.6
Westcott 50W - 4.5

From what I see the Westcott 27 and Flashpoint 30W shows up similar results, (you need to allow the bulbs to warm up for a good minute or two before testing), followed by the 45W Flashpoint and the strongest are the Westcott 50W.
If someone else did some other tests and have other aspects to consider I'll be happy to know as the price different is big.

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