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Screw in Compact Fluorescent bulbs have an integrated ballast. Which means the transformer to light the bulb is already built into the unit. Just replace the incandescent, or old compact fluorescent light bulb and screw in the new one.
Block Lighting is in business to provide our customers with not only the products they need but also with the expertise today lighting environment demands. Our complete line if light bulbs includes, Compact Fluorescents, Halogens, Metal Halides, High Pressure Sodiums, Linear Fluorescents, Incandescents, and LEDs. Anything we left out... we also sell. Call us if you have questions: 800-237-9500
Our Price: $2.11
SKU: XA-FE-IISB-9W/41K
Stock Status: In Stock
Manufacturer: Longstar
Spiral Bulb Shape,E26 Base,9 watt 4100K Compact Fluorescent Medium Base Spiral

Our Price: $6.17
SKU: XA-FE-IS-40W/50K
Stock Status: In Stock
Manufacturer: Longstar
Spiral Bulb Shape,E26 Base,40 watt 5000K Compact Fluorescent Medium Base Spiral
Our Price: $8.55
SKU: XA-R40 FE-RSF-30W/50K
Stock Status: In Stock
Manufacturer: Longstar
R40 Bulb Shape,E26 Base,30 watt R40 5000K Compact Fluorescent Medium Base R40
Our Price: $17.06
SKU: XA-FE-IIIB-85W/50K
Stock Status: In Stock
Manufacturer: Longstar
Spiral Bulb Shape,E26 Base,85 watt 5000K Compact Fluorescent Medium Base Spiral
Our Price: $6.26
SKU: XA-R30 FE-RSF-20W/41K
Stock Status: In Stock
Manufacturer: Longstar
R30 Bulb Shape,E26 Base,20 watt R30 4100K Compact Fluorescent Medium Base R30
Our Price: $7.06
SKU: XA-FE-G40-23W/50K
Stock Status: In Stock
Manufacturer: Longstar
G40 Bulb Shape,E26 Base,23 watt G40 5000K Compact Fluorescent Medium Base G40
Our Price: $8.45
SKU: PE31253
Stock Status: In Stock
Manufacturer: Green Energy Lighting
23 Watt, Cool White, PAR38 CFL Bulb Two-Piece Hard Glass
Our Price: $7.55
SKU: PE31234
Stock Status: In Stock
Manufacturer: Green Energy Lighting
15 Watt, Bright White, PAR30 CFL Bulb Two-Piece Hard Glass
Our Price: $18.77
SKU: XA-FE-IIIB-105W/50K
Stock Status: In Stock
Manufacturer: Longstar
Spiral Bulb Shape,E26 Base,105 watt 5000K Compact Fluorescent Medium Base Spiral
Our Price: $5.85
SKU: XA-FE-R40-20W/50K
Stock Status: In Stock
Manufacturer: Longstar
R40 Bulb Shape,E26 Base,20 watt R40 5000K Compact Fluorescent Medium Base R40

Our Price: $6.08
SKU: TC28904TC-35
Stock Status: In Stock
Manufacturer: TCP
4 Watts,120,Spiral Bulb Shape,E12 Base

Our Price: $2.87
SKU: TC33109SP
Stock Status: In Stock
Manufacturer: TCP
9 Watts,120,Spiral Bulb Shape,GU24 Base