How to find the right LED Lamps AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in LED Lamps
- Retrofit type for tubes
- Type A runs on the existing fluorescent ballast. Type B needs ballast bypass and line voltage at the sockets. Type C uses its own remote driver. Hybrid types do both. Installing the wrong type can damage the tube or create a shock hazard.
- AC/DC and polarity
- For miniature and indicator LED replacements, choose 'AC/DC' or non-polar versions unless you know the circuit's DC polarity. Polarized LEDs stay dark when inserted the wrong way round.
- Dimmer compatibility
- Use LEDs marked dimmable, and check the maker's dimmer compatibility list (TRIAC/leading-edge vs ELV/trailing-edge). Mismatched dimmers cause flicker, buzzing, or a poor dimming range.
- Enclosed fixture rating
- Use LED bulbs labelled for enclosed fixtures wherever the fixture traps heat. Heat is the main cause of early LED driver failure.
- Color quality
- Choose a color rendering index of 90 or higher and matched color temperature for task or display lighting. Prefer low-flicker drivers for work areas and video. Cheap LEDs vary in color between bulbs and can flicker visibly on camera.
- Discrete LED drive
- Bare LEDs need a current-limiting resistor or constant-current driver sized from the supply voltage, forward voltage and rated current. Driving a bare LED directly from a voltage source destroys it.
Brands that matter
- Philips (Signify): Broad LED bulb and tube range, including ballast-compatible tubes.
- Sylvania / LEDVANCE: LED bulbs and tubes with published ballast compatibility lists.
- Cree Lighting: LED bulbs and commercial retrofits.
- Waveform Lighting: High-color-rendering LED bulbs and strips for color-critical work.
- Feit Electric: Widely available LED replacement bulbs.
- Satco: LED replacements for odd bases and specialty lamps.
- Dialight: Industrial and indicator LED products.
- Kingbright: Discrete indicator LEDs for electronics projects.
What to avoid
- LED tubes with no ballast compatibility list or retrofit type stated.
- Non-dimmable LEDs on dimmer circuits.
- Standard LED bulbs in fully enclosed fixtures.
- Polarized LED indicator replacements in unknown-polarity sockets.
Questions
Why does my LED flicker or glow faintly when switched off?
Usually a dimmer or illuminated switch leaks a small current, or the dimmer is incompatible. Use a compatible dimmer or a non-illuminated switch.