What an LED Driver Does
An LED driver converts mains AC power (230V, 50Hz in India) to the regulated DC current that LED chips need. LEDs are current-controlled devices - they must receive a precise, constant current regardless of input voltage fluctuations. A driver that allows current to vary even slightly causes: visible flicker, accelerated LED aging, inconsistent colour temperature between lights, and early failure. A quality driver maintains constant current output even when input voltage fluctuates between 180V and 265V (the full range seen in Indian grids).
Key Driver Specifications to Check
Input voltage range: minimum 100–277V for Indian conditions. Output current tolerance: ±5% (tighter is better). Power factor: ≥ 0.95. THD (Total Harmonic Distortion): ≤ 10%. Efficiency: ≥ 90% (so the driver itself wastes less than 10% of input power). Operating temperature: -40°C to +70°C (important - driver temperature inside the fixture can reach 60–65°C in Indian summer). IP rating of driver: IP65 for outdoor/humid environments (or fully sealed within IP65 fixture). Surge protection: 4kV/2kA minimum for outdoor street lights exposed to lightning.
Driver Brands Trusted in India
Premium tier: Meanwell (Taiwan) - the gold standard for reliability, widely specified in government and export tenders. Inventronics (China) - excellent quality, used in premium LED street lights. Osram/Ledvance drivers - German quality. Mid-tier (acceptable for most projects): Moso, Fulham, Eaglerise. Budget/unknown brands: avoid for public road lighting and industrial applications. A ₹300 driver in a ₹8,000 street light is a false economy - driver failure in 18 months requires field replacement that costs ₹2,000 in labour alone. Xera Tech uses Meanwell and Inventronics drivers across its product range.
How to Identify the Driver When Buying
Ask the supplier: 'What driver brand is used in this luminaire?' A confident quality manufacturer names the driver brand immediately. 'In-house driver' or 'proprietary driver' without naming a known brand is a red flag. Request the driver specification sheet as part of product documentation. For tender specifications: write 'LED driver from Meanwell, Inventronics, or equivalent internationally recognised brand, rated for 100–277V input, PF ≥ 0.95, THD ≤ 10%' - this excludes cheap unknown drivers without naming specific brands (which would be non-competitive in government tenders).
