OSRAM CFL SQUARE 28W/835 3,500K GR8 CFL — 2,050 lm
€29.90
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OSRAM CFL SQUARE 28W/835 compact fluorescent lamp, flat square (2D) tube, 28 W, 2,050 lm, white 3,500 K, CRI 82, GR8 base (2-pin). Non-integrated (external ballast).
CFL SQUARE28 W2,050 lmGR83 500 K835
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Expert advice
Lighting specialist, Strasbourg
The OSRAM CFL SQUARE 28W/835 compact fluorescent lamp (colour code 835) is a low-energy lamp with a flat square (2D) tube and a GR8 base. It emits white light at 3,500 K and about 2,050 lumens, with good colour rendering (CRI 82).
A non-integrated lamp (no built-in ballast), it fits GR8 CFL luminaires and runs at 230 V through the fitting's ballast: 2-pin (magnetic ballast, integrated starter). Its long life (≈10,000 h) and low consumption make it an economical choice for commercial lighting.
Direct cross-references from other manufacturers: GE 2D 28W/835. Same GR8 base and same colour code 835: it replaces them without any change to the fitting.
Technical specifications
| Brand | OSRAM |
|---|---|
| Type | Non-integrated compact fluorescent lamp |
| Configuration | CFL SQUARE — flat square (2D) |
| Power | 28 W |
| Luminous flux | 2,050 lm |
| Colour temperature | 3 500 K (white) |
| Colour rendering (CRI) | > 82 |
| Base | GR8 |
| Pins | 2-pin (magnetic ballast, integrated starter) |
| Lifespan | ≈10,000 h |
| Voltage | 230 V |
| PHILIPS equivalent | No direct equivalent |
| GE Lighting equivalent | GE 2D 28W/835 |
| SYLVANIA equivalent | No direct equivalent |
| Disposal | Contains mercury — WEEE recycling |
Key benefits
✓GR8 base — direct replacement in CFL SQUARE luminaires
✓white 3,500 K light, CRI 82 — reliable colour rendering
✓2-pin (magnetic ballast, integrated starter)
✓Long life ≈10,000 h and low consumption
Ideal for
Offices and open spacesSchools and classroomsRetail and large storesDownlights and ceiling lightsCorridors and washrooms
Frequently asked questions
Is it compatible with my fitting?
Yes, if the fitting has a GR8 base, the same wattage (28 W) and the right ballast. This is a non-integrated lamp: it needs the fitting's ballast and does not connect directly to the mains.
What is the PHILIPS, GE Lighting or SYLVANIA equivalent?
This lamp directly matches GE 2D 28W/835. Identical GR8 base, 28 W wattage and 835 colour code: a like-for-like replacement.
What is the difference between 2-pin and 4-pin?
The 2-pin version has a built-in starter and runs on a magnetic ballast. The 4-pin version runs on a high-frequency electronic ballast (fast start, flicker-free, often dimmable). Bases differ: match the one in your fitting.
What does the 835 code mean?
The first digit (8) indicates a CRI of 80 to 89; the next two give the colour temperature: 835 = 3,500 K (white).
How is it recycled?
Like all fluorescent tubes, it contains a small amount of mercury: take it to a WEEE collection point (recycling centre or store), never with household waste.
Why order from STRASSELEC?
- ✓Lighting specialist — expert advice and professional references
- ✓Fast shipping from Strasbourg (France and Europe)
- ✓Secure payment by card or bank transfer
- ✓14-day returns (right of withdrawal)
Need advice, a batch or a large quantity? The STRASSELEC team is here to help.
📦 Minimum order quantity: 2 pieces
CFL SQUARE 28W 835 OSRAM GR8
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OSRAM CFL SQUARE 28W/835 compact fluorescent lamp, flat square (2D) tube, 28 W, 2,050 lm, white 3,500 K, CRI 82, GR8 base (2-pin). Non-integrated (external ballast).
CFL SQUARE28 W2,050 lmGR83 500 K835