Qty:1
CowboyStudio Set of Two 1... has been added to your Cart
Condition: Used: Very Good
Comment: Minor cosmetic imperfection on front of item (less than 1/4"x1/4"). Minor cosmetic imperfection on top or sides of item (less than 1/4"x1/4"). Item will come in original packaging. Packaging may be damaged.
Have one to sell? Sell on Amazon

CowboyStudio Set of Two 105 Watt, 5500 K Fluorescent Daylight Balanced Light Bulb for Photography and Video Lighting

3.8 out of 5 stars 203 customer reviews
| 7 answered questions

List Price: $39.99
Price: $36.90 & FREE Shipping. Details
You Save: $3.09 (8%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
2 x 105W/5000
  • Two (2) 105 watt bulbs
  • Incandescent equivalent: 400 watts
  • 9" Tall x 2 3/4" Wide
  • Average life: 8,000 hours
  • Color temperature: 5000 K
4 new from $28.03 7 used from $23.88
$36.90 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • CowboyStudio Set of Two 105 Watt, 5500 K Fluorescent Daylight Balanced Light Bulb for Photography and Video Lighting
  • +
  • Photography Photo Portrait Studio 600W Day Light Umbrella Continuous Lighting Kit by LimoStudio LMS103
Total price: $86.40
Buy the selected items together

Special Offers and Product Promotions

Style: 2 x 105W/5000

Product Description

Style: 2 x 105W/5000

Compact fluorescent light bulbs use up to 75% less energy and last up to 10 times longer than standard light bulbs. The total cost of ownership of a compact fluorescent lightbulb is typically substantially less than a standard light bulb that produces the same amount of light. Primary applications for compact fluorescent light bulbs include retail, hospitals, warehouses, workshops, churches, arena, schools, television, photography, and garages.

5000k daylight compact fluorescent standard spiral bulbs are an excellent choice for digital camera photography. They generate a close match to natural daylight and a crisper view of the items being illuminated.


Product Details

Style: 2 x 105W/5000
  • Product Dimensions: 7.9 x 7.9 x 7.9 inches
  • Shipping Weight: 2.2 pounds (View shipping rates and policies)
  • ASIN: B004L75BGQ
  • Item model number: 2x 105 W/5K SPRIAL
  • Average Customer Review: 3.8 out of 5 stars  See all reviews (203 customer reviews)
  • Amazon Best Sellers Rank: #1,611 in Camera & Photo (See Top 100 in Camera & Photo)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
  • Date first available at Amazon.com: January 27, 2011

Customer Reviews

Top Customer Reviews

Style Name: 2 x 105W/5000 Verified Purchase
2012-07-06: Updated to add detail to light measurement methodology. The results of the test have not changed.

Serious photographers and videographers may want to read all this info about multiple CFLs tested. Others can skim it for the CowboyStudio 105 watt specific evaluation.

I have been testing CFLs for a couple important projects that need continuous light. The tests include measuring light falling on the subject (measured in LUX with a Lux meter and confirmed with a Sekonic Digital Incident Lightmeter), color temp/quality, and actual power consumption. Since a lot has gone into this, and the results are "interesting" especially in terms of this specific CFL, I decided to share my opinions. Apologies for another long, but fact filled, review :-)

The tests were all conducted with bulb warm-up times > 30 minutes, professional digital light metering, test RAW still images of a Kodak Q-60 target, and continuous monitoring of power factors. I also tested 3 100 W incandescent bulbs to see how efficient these CFLs really are.

Against incandescent lamps, including one with an encapsulated Halogen source, these CFLs generate 5 to 6 times more illumination per watt consumed! For real! This means having lots of light to work with with far less heat, power consumption and fewer blown circuit breakers on location!

The good news is that CFLs come out very serviceable and and efficient . . . but this "105 watt" CowboyStudio CFL is at the back of the pack. Way back.

Amazon sourced Full Spectrum/Photo/Video CFLs tested included:

CowboyStudio "105w":
...Read more ›
12 Comments 257 of 257 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Style Name: 2 x 105W/5000 Verified Purchase
One star is generous for these (it will not allow 0 stars) These lights are no where near the rated 105 watts. I bought them to replace my 85 watt flashpoint lights and the 85 are brighter!!! I put the lights on and tested with light meter and the 85 watt are a full 2 stops brighter !!! What they don't tell you in the above is that YOU CANT RETURN THEM. Save your money and look else where. Heck these are going on ebay right after this post!!
1 Comment 39 of 40 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Style Name: 4 x 45W/5000 Verified Purchase
The first question in my mind is, is it truly "full spectrum" white? So I set up a very simple way to measure it. I am sure that it is not perfect by many scientists' standard. I am limited to the resources at my disposal.

Using a Da-Lite projector screen as the background and a standard desk lamp as the housing for the light source (I don't have a studio lighting setup yet), I set my Canon T2i to raw mode. Except for auto exposure, the camera does not do any auto processing including ISO. The photos are then imported into Photoshop without any kind of enhancement. The center point of the image is sampled and Photoshop can tell me the color composition of that sample.

For comparison purposes, I also measured two other light sources: Canon 430EX flash light and Feit 18W(75W equivalent) household CFL with "Daylight" color temperature. The results are color charted in Excel and uploaded to this product page above. They are surprising.

To be "full spectrum" or white (either terminology is not quite precise), the strengths of the three prime colors need to be equal. The strength is number between 0 and 255. (0,0,0) is pure black and (255,255,255) is pure white. Human eyes are usually quite tolerant of difference in the single digit range. Most people, including me, would expect the $300 Canon speed light to be a very color neutral light source. But no. It actually has a visible blue tint. It is only marginally better than the $1 Feit "Daylight" household CFL. I am not suggesting that a flash light and a CFL are interchangeable, it is nevertheless disappointing that the Canon can't get a tight color balance in that expensive device. The best one, by a significant margin, is the Cowboystudio photo CFL.
Read more ›
3 Comments 54 of 59 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Style Name: 4 x 45W/5000 Verified Purchase
I plugged these into my kill-a-watt meter to see how much power they are using. It turns out they are only using about 23 watts, half of the rated 45 watts. By comparison another CFL I have is rated 85w and uses 70 watts. I had been wondering why the coils were physically about a third the size of the 85W bulbs, and now I know: They use about a third of the power.

The light quality is quite close to 5500k, but as with all flourescents they have a green spike that causes them to show up as just a little green when shooting on the daylight preset of a camera. I get whiter whites with the florescent preset.

Using the rule of thumb that florescent lights use about a fifth the power of tungsten, this would be about the equivalent of a 100 watt bulb. Not bad, but don't count on more light than that.
9 Comments 42 of 46 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Style Name: 4 x 45W/5000 Verified Purchase
I should have read the reviews before I ordered these CFLs. They certainly are large enough to be 45 watts, but as soon as I screwed one in my flood lamp and turned it on, it was obvious that it wasn't even close. After leaving the Cowboy Studio CFL on to fully warm up, I measured the power it consumed at 21 watts, less than half of what it's rated for. I also checked the light output with a light meter and found it less than another CFL I have that is rated at 23 watts and cost under a dollar at Home Depot. These CFLs are going back tomorrow, on Amazon's dime.
Comment 15 of 15 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse

Most Recent Customer Reviews

Set up an Amazon Giveaway

Amazon Giveaway allows you to run promotional giveaways in order to create buzz, reward your audience, and attract new followers and customers. Learn more
CowboyStudio Set of Two 105 Watt, 5500 K Fluorescent Daylight Balanced Light Bulb for Photography and Video Lighting
This item: CowboyStudio Set of Two 105 Watt, 5500 K Fluorescent Daylight Balanced Light Bulb for Photography and Video Lighting
Price: $36.90
Ships from and sold by Amazon.com
Want to discover more products? Check out these pages to see more: compact fluorescent light bulbs, br30 light bulb, r20 bulb, light blubs