Energy saving light bulbs: Compare features & prices Osram Duluxstar 21W review
This 100W equivalent Osram Duluxstar is relatively cheap for a CFL-type bulb (the most common type of energy saving lamp). To find out if the Duluxstar provides good value, we tested it on a range of key measures including how bright it is at start-up, how it fares in cold temperatures, and crucially, how long it lasts. Read on to find out how it scored.
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Osram Duluxstar 21W
- Which? score:
| GBP2.81 | ||
| What is this? | ||
| Fitting | E27 |
|---|---|
| Wattage (W) | 21 |
| Type of bulb | CFL |
| View full specification | |
| Light output and efficiency |
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|---|---|
| Light at start-up |
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| Overall durability |
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| View all test results | |
