GU10 halogen bulb on a trailing-edge dimmer won't dim smoothly
Filament bulbs dim on both dimmer types; flicker points to a failing bulb or a loose connection. There's no standard minimum load: use the minimum and maximum printed on your dimmer — with 35 W GU10 bulbs a 10 W minimum needs 1, a 40 W minimum 2. The bulb must be marked dimmable.
Filament bulbs dim on both dimmer types; flicker points to a failing bulb or a loose connection.
Lights for this
GU10 × 5 · dimmable as stated by the supplier
Arrives 14–24 Oct
from £221
GU10 · dimmable as stated by the supplier
Arrives 14–24 Oct
£109
GU10 · dimmable as stated by the supplier
Arrives 14–24 Oct
£109
GU10 · dimmable as stated by the supplier
Arrives 14–24 Oct
£132
GU10 · dimmable as stated by the supplier
Arrives 14–24 Oct
£141
GU10 · dimmable as stated by the supplier
Arrives 14–24 Oct
£141
GU10 · dimmable as stated by the supplier
Arrives 14–24 Oct
£340
GU10 · dimmable as stated by the supplier
Arrives 14–24 Oct
Nothing here matches. Try a higher price or clear the filters.
The numbers for this situation
- Typical bulb35 Whalogen GU10
- Bulbs for a 10 W printed minimum1the minimum printed on your dimmer decides
- Bulbs for a 40 W printed minimum2
- Our GU10 lights stated dimmable8
- Share of our GU10 lights stated dimmable6 %
Worked out, not measured
Where these numbers come from
- Bulbs needed = the minimum printed on the dimmer ÷ the bulb's watts, rounded up; typical bulb wattages are assumptions. Checked against 9 matching lights in our catalogue snapshot of 2026-09-27; 8 can be bought now. Same sums on every page, release families-2026-09-29.
All the numbers
| Minimum printed on the dimmer (W) | Bulbs needed | Load (W) |
| 0 | 1 | 35 |
| 10 | 1 | 35 |
| 20 | 1 | 35 |
| 40 | 2 | 70 |