Lighting7 min read
What Is CRI in LED Lighting? CRI 80 vs CRI 90 Explained
CRI is a familiar lighting specification, but the number is only one part of colour quality. Here is how to read it without the marketing noise.
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Understand the technology behind better connected products.
Original Pearlexa articles about lighting, connected products, IoT and product selection — written to explain the technology clearly without exposing confidential engineering or security implementation details.
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Start with the fundamentals
Sri Lanka-specific buying guidance is published only on pearlexa.lk; general technical articles are available across both Pearlexa sites.
Lighting8 min read
What Causes LED Flicker? A Practical Guide to Flicker-Free Lighting
LED flicker is more complicated than whether your eyes can visibly see a lamp flashing. Driver design, dimming and modulation all matter.
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Lighting7 min read
2700K vs 4000K vs 6500K: Which Light Colour Should You Choose?
Kelvin describes the appearance of white light — not its brightness or quality. Here is a practical way to choose a colour temperature for each room.
Read insightLighting7 min read
Lumens vs Watts: How Bright Is a 14W LED Bulb?
Watts tell you how much electrical power a lamp uses. Lumens tell you how much visible light it produces. Modern LED shopping starts with lumens.
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Product Guides6 min read
Orbit Standard vs Orbit Pro: Which Pearlexa Smart Bulb Is Right for You?
Both Orbit models share the Pearlexa connected-lighting experience, but they are engineered for different electrical and performance requirements.
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Engineering8 min read
Why Thermal Management Matters in LED Bulbs and Smart Lighting
A smart bulb is a compact power supply, LED engine, radio and computer living in a warm enclosure. Thermal engineering is therefore part of product reliability, not a cosmetic detail.
Read insightBuying Guides10 min read
Smart Bulb Buying Guide for Sri Lanka: What to Check Before You Buy
A smart bulb is both a lighting product and a connected electronic device. In Sri Lanka, electrical rating, local support and long-term software quality matter as much as app features.
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Technical explainers link to standards bodies, regulators and authoritative public guidance where practical.
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