H44GS-100SP-Ad Medium 100W Mercury Spot R
H44GS-100SP 100W Mercury Spot R

The Ad-Medium version of this lamp is discontinued. We have no remaining stock.

We have plenty of the Medium screw version of the lamp in stock here.

A possible E26 medium screw socket replacement is located here.

Lamps ordered will be shipped the next business day by USPS Priority Mail or UPS. Large orders may qualify for a discount and may not qualify for next day shipment. If you do not know what lamp you require or for lamps not listed, email your request or call 336-882-2854. To order, please use our secure shopping cart above or call 336-882-2852 or 800-692-3051. Click to go to our Home Page, View Cart and to find Shipping Information.

Wattage: 100W, 100 Watt, Watts
Ballast: H44
Voltage: Not a Line Voltage Lamp, Ballast Required
Base: E29 Admedium, Ad Medium Skirted Screw, E29s
Beam Spread: 8° Spot
Glass: PAR38, 4.75" Diameter
Color Temperature: 5900°K
Average Rated Life: 16,000 Hours
Lumens: Initial First 100 Hours 2500, Average 1950
CRI: 20
Maximum Overall Length: 5.45"
Special Features: Blacklight, Black Light

The following graph is not a specification and was measured from a randomly selected sample October, 2009.
For more details go here.

H44GS100 100W UV Wavelength Graph

Alternate Part Numbers: R100W Mercury Spot, PAR38 Mercure Vapor Black, H44GS-100/SP, 1-00-46135-68843-7, 68843-0, Ad Medium Skt Base, 0-46135-68843-0, M.V. Mercury Vapor, HR100SP44, H44GS-100SP, H44-100, A-Medium, 9020467, BLE-100S/M, H44GS-R100, HR100-PSP44, H44JM-100, H44 JM-100, Westinghouse H44-4GS Mercury Spot

Blak-Ray ® High Intensity UV Lamps

UVP 34-0011-01, For All B-100 Externally Ballasted Lamps

Zyglo/Magnaflux Fluorescent Penetrant Testing Kit

Cross reference information is designed to help you find the correct lamp for your application. We do not verify the accuracy of this information. You are responsible for ordering the correct lamp and we make every attempt to help you in that process. We recommend that you confirm the information with the equipment manufacturer before ordering.

800 Burton Avenue, Suite 107
High Point, NC 27262
336-882-BULB (2852)

Order Line: 800-692-3051
Technical Support Line: 336-882-2854
Fax Line: 336-882-2819

Hours: 8 AM to 4 PM EST Monday through Friday

Sales: Address changes, invoice copies, tracking and delivery confirmation numbers, order status, product availability, payment options, shipping quotes, returns, damage claims

Technical Support: Help finding a product not listed, determining the correct lamp for your application, lamp handling and premature lamp failures

International Orders: Large international orders that require special shipping arrangements and quotes

If you have compliments, complaints, suggestions, or help with areas not listed above please contact:

Ron Miller
General Manager