Part Number:
Lamp Category:
Ready to Ship - In Stock Ready to Ship - In Stock


Watts: 21 Watts
Length: 436 mm
Base: B4
Base Description: 2 Pin Mini Double Ended (B4)
Qtz. OD: 15 mm
Wiring: Preheat
Output: Standard
Category: Preheat
Type: L
Wires: 0
Description: GPH436T5L
Note: Color of Lamp Base has no bearing on operation or use, and should not be considered when determining lamp needed.

This lamp is a replacement lamp for the following Atlantic Ultraviolet Corporation® Ultraviolet Water Purifiers:

Brand Model

If you are looking to purchase replacement parts for your SANITRON® S23A or MIGHTY★PURE® MP22A, consider buying our maintenance kits which contain a replacement lamp, quartz sleeve, and O-rings.

[   SANITRON® S23A Maintenance Kit   |   Mighty★Pure® MP22A Maintenance Kit  ]

This lamp is an equivalent replacement lamp for the following:

Brand Model
American Air & Water L-590417
Aqua Treatment Services, Inc. ATS2-436
Crystal Clear CMP22
Evoqua Water Technologies W2T173436
Ideal Horizons 22002, IH-25, IV-25, LMP22002, SH-7, SH-10, SH-20, SHE-7, SHE-10, SHE-20
Martin Water Conditioning CMP22
Master Water Conditioning Corporation HIMSP6165
Siemens / Sunlight LP4095
Water Gem WG 8
Water Treatment & Accessories 05-0350, 05-0350-1
Wedeco LMP22002, SHE-7, SHE-10, SHE-20

Disclaimer: This is an Atlantic Ultraviolet Corporation® STER-L-RAY® brand lamp. It can be used as an equivalent replacement lamp for other brands.

ArmorLite™ Safety Shield is available for use with most STER-L-RAY ® Germicidal Ultraviolet Lamps. Contact our Ultraviolet Application Specialists to discuss the advantages of using germicidal lamps protected by the ArmorLite™ Safety Shield in your installation.

Our STER-L-RAY ® brand of Germicidal Ultraviolet Lamps can be used as equivalent replacement lamps for over 250 equipment brands and 5,000 models of ultraviolet equipment besides Atlantic Ultraviolet’s Air and Water Purifiers.

Can’t find lamp you are looking for? Each of our UV Application Specialists has access to an extensive cross referencing interface. Call us directly at 1-631-273-0500, Monday through Friday, 7am–6pm EST, email us at

Shipping Info

    Items marked "Ready to Ship - In Stock" are ready to ship and will do so promptly. Items marked "Varied Ship Date - Contact Us" are in production, and the ship date varies. Please place order & contact us for ship date.


Part Category:
Atlantic UV Product Line:
Mighty Pure, Sanitron
Base Category (Pins per End):
2 Pin Base
Cross Reference Brands A:
Atlantic Ultraviolet MP22, Atlantic Ultraviolet MP22A, Aqua Treatment Service ATS2-436, Atlantic Ultraviolet S23, Atlantic Ultraviolet S23A, ATS ATS2-436
Cross Reference Brands B to F:
Crystal Clear (Martin Water) CMP22
Cross Reference Brands G to O:
Ideal Horizons 22002, Ideal Horizons IH-25, Ideal Horizons IV-25, Ideal Horizons SH-10, Ideal Horizons SH-20, Ideal Horizons SH-7, Martin Water CMP22, Master Water HIMSP6165
Cross Reference Brands P to S:
Siemens LP4095, SterLRay MP22, SterLRay MP22A, SterLRay S23, SterLRay S23A, Sunlight LP4095
Cross Reference Brands T to Z:
Wedeco IV-25, WTA 05-0350, WTA 05-0350-1
Lamp Length:
12 - 24 in. (306 - 610mm)
Ozone Producing:
Replacement Part Type:
Part Type Equipment Brand Model / Part #
Lamp American Air & Water Inc. L-590417
Lamp Aqua Treatment Services, Inc. ATS2-436
Lamp Atlantic Ultraviolet Corporation MP22
Lamp Atlantic Ultraviolet Corporation MP22A
Lamp Atlantic Ultraviolet Corporation S23
Lamp Atlantic Ultraviolet Corporation S23A
Lamp ATS ATS2-436
Lamp Crystal Clear CMP22
Lamp Evoqua Water Technologies LLC W2T173436
Lamp Ideal Horizons 22002
Lamp Ideal Horizons IH-25
Lamp Ideal Horizons IV-25
Lamp Ideal Horizons LMP22002
Lamp Ideal Horizons SH-10
Lamp Ideal Horizons SH-20
Lamp Ideal Horizons SH-7
Lamp Ideal Horizons SHE-10
Lamp Ideal Horizons SHE-20
Lamp Ideal Horizons SHE-7
Lamp Martin Water Conditioning CMP22
Lamp Master Water Conditioning Corporation HIMSP6165
Lamp Mighty Pure MP22
Lamp Mighty Pure MP22A
Lamp Sanitron S23
Lamp Sanitron S23A
Lamp Siemens LP4095
Lamp Ster-L-Ray 05-1097-R
Lamp Ster-L-Ray GPH436T5L
Lamp Ster-L-Ray MP22
Lamp Ster-L-Ray MP22A
Lamp Ster-L-Ray S23
Lamp Ster-L-Ray S23A
Lamp Sunlight LP4095
Lamp Water Treatment & Accessories 05-0350
Lamp Water Treatment & Accessories 05-0350-1
Lamp Wedeco UV Technologies, Inc. LMP22002
Lamp Wedeco UV Technologies, Inc. SHE-10
Lamp Wedeco UV Technologies, Inc. SHE-20
Lamp Wedeco UV Technologies, Inc. SHE-7
Lamp WTA 05-0350
Lamp WTA 05-0350-1