Shopping for lightbulbs can be confusing with so many types and specs. To make it easier, here’s a quick guide to the four main types of lightbulbs, how to identify them, and their pros and cons.
1. Incandescent
The classic bulb with a visible filament.
- Pros: Inexpensive upfront, warm light, dimmable
- Cons: Short lifespan (about 1 year), inefficient — 90% of energy turns into heat
Best For: Accent lighting, basic household use
How to Spot: Traditional bulb shape with glowing filament
2. LED (Light-Emitting Diode)
Highly energy-efficient and long-lasting.
- Pros: Long lifespan (~25,000 hours), low heat, recyclable, dimmable, good for all climates
- Cons: Higher initial cost (offset by energy savings)
Best For: Task lighting, outdoor use, general lighting
How to Spot: Modern design, often labeled “LED,” cool to the touch
3. CFL (Compact Fluorescent Lamp)
Spiral-shaped bulbs that use less energy than incandescents.
- Pros: More efficient than incandescent, lasts longer, good for large spaces
- Cons: Contains small amounts of mercury, slow warm-up time, not usually dimmable
Best For: Kitchens, basements, living rooms
How to Spot: Spiral or folded tube shape
4. Halogen
A brighter, more efficient version of incandescent bulbs.
- Pros: Bright white light, better efficiency than incandescent, compact size
- Cons: Short lifespan, gets hot quickly, not eco-friendly
Best For: Recessed lighting, under-cabinet lights, task lighting
How to Spot: Clear glass with small filament inside, often in capsule shape
Lightbulbs Shape
Lightbulbs come in different shapes to match specific fixtures and styles. For chandeliers, go with candle-shaped bulbs. For pendants, try globe bulbs. Table lamps work best with standard shapes. Most fixtures list the compatible bulb shape on or near the socket.
| Shape | Code | Best For |
|---|---|---|
| Standard | A | Table lamps, general use |
| Capsule | T4 Bi-Pin | Small… |