GE F13BX/835/ECO 13W Compact Fluorescent Bulb

The GE F13BX/835/ECO is a GX23 2-pin plug-in compact fluorescent replacement lamp designed for dedicated CFL fixture housings — the kind found in recessed downlights, under-cabinet task lighting, and commercial wall sconces built around the 2-pin plug-in form factor rather than a standard screw base. The model designation tells the full technical story: F13BX indicates a 13W twin-tube biax form factor, 835 encodes the 80-series CRI and 3500K color temperature, and ECO flags the reduced mercury content. At 825 lumens from 13 watts, it produces the functional equivalent of a 60W incandescent while consuming roughly one-fifth the power — a meaningful efficiency gain in always-on or high-hours-per-day applications. The 3500K output sits in the neutral white zone: warmer and more comfortable than the 4100K cool-white tone of standard commercial fluorescents, but crisper and more task-appropriate than the amber warmth of household incandescents. CRI of 82 means color rendering is accurate enough for the vast majority of general-purpose environments.

GE's ECO designation reflects compliance with TCLP (Toxicity Characteristic Leachate Procedure) standards, confirming reduced mercury content that meets regulated disposal thresholds — a meaningful spec for facilities that need to document lamp disposal. ENERGY STAR certification confirms the power consumption and lumen maintenance figures meet verified efficiency benchmarks. The 10,000-hour rated lifespan translates to over a decade at two hours of daily use, making per-unit operating cost very low for long-run fixture installations. Two operational constraints are non-negotiable: the GX23 base is fixture-specific and cannot be adapted to screw sockets, and the lamp is strictly non-dimmable — dimmer circuit installation will cause flicker and premature failure. For facility managers and contractors maintaining CFL-based fixture inventories, this is a direct specification-matched replacement that avoids the fixture retrofitting cost of moving to LED equivalents while delivering reliable, efficient light output.