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Sunlite SL20/BLB 20 Watt Spiral Energy Saving CFL Light Bulb Medium Base Blacklight Blue

4.2 out of 5 stars 301 customer reviews
| 39 answered questions

Price: $10.16 & FREE Shipping on orders over $49. Details
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1 Pack
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  • 20-Watt, 120 Volt, Medium E26 Base, Compact Fluorescent lighting
  • 75-Watt incandescent equivalent
  • 8,000 hour average lamp life energy saver bulb
  • These party lights spiral bulbs give off uv light output, making them great for decor
  • Black light lamps are great for Halloween decorations
13 new from $8.95

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$10.16 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Sunlite SL20/BLB 20 Watt Spiral Energy Saving CFL Light Bulb Medium Base Blacklight Blue
  • +
  • American Dj 24" Black Light Fixture w/ LAMP Black-24BLB
  • +
  • UV Glow Blacklight Face and Body Paint 0.34oz - Set of 6 Tubes - Neon Fluorescent
Total price: $44.10
Buy the selected items together

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Size: 1 Pack
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Technical Details

Size: 1 Pack
  • Wattage 20W
  • Voltage
  • Base E26 Medium Screw

Compare to Similar Items


This item: Sunlite SL20/BLB 20 Watt Spiral Energy Saving CFL Light Bulb Medium Base Blacklight Blue
Customer Rating 4 out of 5 stars (301) 3 out of 5 stars (21) 4 out of 5 stars (54) 3 out of 5 stars (87)
Price $10.16 $16.99 $7.72 $11.24
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com LightOlight Amazon.com DEALS AND MORE
Color Temperature 2700 Kelvin Information not provided 2700 Kelvin Information not provided
Item Package Weight 0.25 pounds 0.5 pounds 0.15 pounds 0.3 pounds
Item Shape spiral cfl Spiral Spiral Spiral
Light Source CFL CFL Compact Fluorescent Light (CFL) Compact Fluorescent Light (CFL)
Wattage 20 Watts 20 Watts 9 Watts 13 Watts
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Product Description

Size: 1 Pack

Product Description

"Sunlite 5439 -Watts 20 Watts -Lumens -MOL 5.43"" -Base Type Medium E26 Base -Bulb Color 2700 K, Soft White -Life Hours 8000"

From the Manufacturer

Sunlite Blacklight Spiral Compact Fluorescent lamps are ultra compact, fit into most standard fixtures and give off a backlight blue light much like a 75 Watt incandescent bulb. These energy efficient CFL lamps can last up to 7 years with normal household use of 3 hours a day. This Sunlite Energy Saving 20 Watt blacklight blue spiral CFL medium base bulb an average rated life of 8,000 hours. Very versatile and great for ambient lighting.

Product Information

Size:1 Pack

Technical Details

Part Number SL20/BLB
Item Weight 4 ounces
Product Dimensions 2.9 x 2.6 x 6 inches
Item model number SL20/BLB
Size 1 Pack
Shape spiral cfl
Voltage 120 volts
Wattage 20 watts
Item Package Quantity 1
Type of Bulb CFL, Fluorescent
Special Features Wattage 20W, Voltage, Base E26 Medium Screw
Batteries Included? No
Batteries Required? No

Additional Information

ASIN B002P4TYVK
Customer Reviews
4.2 out of 5 stars 301 customer reviews

4.2 out of 5 stars
Best Sellers Rank #3,787 in Home Improvements (See top 100)
#2 in Musical Instruments > Live Sound & Stage > Lighting Equipment & Accessories > Black Lights
#12 in Industrial & Scientific > Industrial Electrical > Lighting Components > Light Bulbs > Compact Fluorescent Bulbs
Shipping Weight 4 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available September 14, 2009

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From the Manufacturer


Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: 1 Pack
So after reading the reviews I was skeptical about buying socket bulbs, but after buying two different types, this one is by far the best and even comparable to the other tube black lights I bought. My roommates and I throw black light parties, and these worked great for places like hallways and the bathroom to keep the mood going when not near the big tube ones. They make black light reflective things glow, as well as make the whites glow blue. It lit up my whole kitchen, and not with the annoying blue or purple light, but with true black light, to the extent that even clear plastic cups had a blue glow tinge. Not too bright, but they definitely work in the pinch areas. If you are thinking of using these for black light parties or to just light up your small to medium size room, these are almost as good as getting an 18" fluorescent tube light, and definitely the cheaper alternative.
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Size: 1 Pack Verified Purchase
I ordered two for my son's birthday party. I've been testing them out in different places in the house (bathroom, bedroom, walk-in closet) and they work great. Everything that can glow does- white, neon, words written with a highlighter. I even discovered items that I didn't realize would glow, like a bright orange laundry bag and a belt. Much better than the other blacklight lightbulbs we have. I'm ordering two more because our basement has four light sockets.

Update- June 19--Just had my son's party and the light was fantastic. Made everything neon or white stand out! The party got rave reviews from kids and parents thanks to the lights.
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Size: 1 Pack Verified Purchase
I have no complaints about this product; it performs exactly as expected.

We intend to use it as part of our Halloween display. When I saw the word "blue" in the title description of this item, I was a little worried that it wasn't a true 'blacklight', but now that I have it in hand, I can confirm that it works great, and has produced excellent results with our flourescent paints. Now that I know the bulb meets our needs, I intend to purchase several more, to incorporate into our Halloween displays.
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Size: 1 Pack Verified Purchase
This light gives off a lot of visible purple light and not much ultraviolet. I doesn't make things glow well, and the visible light masks much of the glowing of objects. I'm comparing it side-by-side to a fluorescent tube backlight that I've had for many years.
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Size: 3 Pack Verified Purchase
These are the best cfl style blacklights currently available. I've tested blacklight CFLs from sunlite, Feit, Sleeklighting and Slice of the moon. The tested bulbs range from 13w thru 25w. These are the most effective of them all. I don't like to say bright because a blacklight that looks bright isn't a good blacklight. A good blacklight makes mostly invisible light with little to no visible light. Unlike high quality tube fluorescents and Mercury HID blacklights of the tested CFLs emit a good deal of visible light. However these are better than the other three tested in that they emit far more UV than visible light. They excite UV reactive objects better better than the other 3 as well. Out of 10 of these SL20bulbs that I used for a month, only one failed. Only the Feit matched the reliability. Though the Feit is not as effective as a blacklight. The Sleeklighting bulbs are much more fragile with a thinner tube. I tested two of those. One broke while screwing it in. The other failed within about 3 weeks. I tested 2 Slice of the moon bulbs. One failed in a ball of fire as soon as I first turned it on. The other failed in 10 days. It's the most expensive, and largest bulb. It emits a lot of visible light and very little blacklight
The only negative about these Sunlite bulbs is that their plastic base is larger than typical CFLs. This limits your options on which fixtures in which it can be used.
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Size: 1 Pack Verified Purchase
My kids and I have been making all sorts of Halloween crafts that glow under black light, so we needed an affordable solution to make them glow in the window!

I easily installed this bulb in a standard light socket in a lamp we had (one with a moveable goose-neck to move around). I positioned the bulb about 24 inches above the objects. The bulb makes plenty of light to illuminate all our crafts in a large bay window. It doesn't light up the whole room, but definitely enough light for a window display. Plus, if you stand in front of our house on the sidewalk--the entire window area seems to be glowing purple! The kids think this is awesome!

I'm buying more for our driveway lights for trick or treat night!

I just uploaded photos to show how I'm using it!
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Size: 1 Pack Verified Purchase
Yes I recommend this as a great black light bulb that works like it should and can screw into a light fixture which is great when you don't have room for the long tube systems that black lights are usually associated. I say this bulb works like it should and gives a wonderful black light effect that does not hurt the eyes, but is bright enough to do the job, you will not disappointed for use in black light parties or poster lighting. I have a black and white poster that looks great with this bulb. This is not the cheap ineffective standard black light that goes for light fixtures that just glow purple, this bulb glows like a black light should, your whites will stand out and anything that glows will look brilliant!
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This item: Sunlite SL20/BLB 20 Watt Spiral Energy Saving CFL Light Bulb Medium Base Blacklight Blue