2G11 18W Bulb H-Shaped Tube with 4-Pin Base Blue Light - For Indoor Outdoor 18W Appliance Light Lamps - 2 Pack

18W 2G11 H-Shaped Replacement Bulbs (Blue Light / Bug Zapper)

Key Features

• Maximum Insect Attraction: Specifically engineered to emit an optimal blue/UV-A light spectrum that acts as a highly effective lure for mosquitoes, gnats, flies, and other light-sensitive flying insects.
• H-Shaped Twin Tube Design: The specialized H-shape (also known as a PLL tube) provides a wider, 360-degree radius of light dispersion, maximizing the effective catch area of your electronic bug zapper.
• Long-Lasting Performance: Built with premium fluorescent gases and durable glass, these bulbs are designed to provide up to 5,000 hours of continuous use, keeping your outdoor spaces bug-free for the entire season.
• Universal 2G11 Fit: Features an industry-standard 2G11 base (four metal pins arranged in a single straight line) that locks securely into compatible high-voltage appliance sockets without wobbling.

Product Specifications

• Base Type: 2G11 (4-Pin Inline).
• Bulb Shape: H-Shaped / Twin Tube.
• Wattage: 18 Watts.
• Dimensions: 8.7" L x 1.7" W x 0.9" D.
• Light Output: Blue Light / UV-A.

Compatibility & Applications

This specialty bulb is the standard replacement for medium-to-large electronic insect killers. Compatible applications include:

• Outdoor Bug Zappers: Fits standard 18W residential and commercial lantern-style mosquito zappers used on patios, decks, and in gardens. (Compatible with popular 18W 4-pin models from brands like AMUFER, Black+Decker, Livin Well, and others).
• Indoor Fly Traps: Ideal for commercial kitchens, restaurants, or garages utilizing wall-mounted UV sticky traps or high-voltage grids.
• Appliance Lighting: Can be used in specific air purifiers or specialized home appliances that specifically call for an 18W 2G11 blue light.

When to Replace

• Decreased Bug Catching (PRO TIP): UV phosphors degrade over time. Even if the bulb is still glowing blue, its invisible UV output drops significantly after 4 to 6 months of nightly use. Replace them seasonally for maximum insect-killing efficiency.
• Flickering or Dark Ends: If the bulb takes a long time to turn on, flickers constantly, or the glass near the plastic base has turned heavily gray or black, the bulb is exhausted and must be replaced.

Installation & Safety Tips

• Safety First (CRITICAL): Bug zappers hold a high-voltage electrical charge. Unplug the device from the wall and use a screwdriver with an insulated handle to short across the internal metal grid to discharge any residual electricity before touching the bulb.
• Check Your Pins: Ensure your current bulb has four pins in a straight line (2G11). Do not confuse this with a G10q (four pins in a square) or a 2G10 (pins in a staggered line).
• Gentle Insertion: Fluorescent tubes are fragile. Hold the bulb by the white plastic base—not the glass tubes—when pushing it into the socket to prevent the glass from shattering in your hands.
• Check the Dimensions: Always measure the length of your old bulb. This replacement is exactly 8.7 inches long. If your fixture is designed for a shorter or longer tube, the outer protective cage may not close.