Energy consumption 4 kWh/1000h at 470 lm Long lifespan - up to 15000 hours and up to 100000 switching cycles. Cool white light for increased concentration and visual acuity, in kitchens, bathrooms or offices Immediately at full power, no warm-up time. Easy replacement of standard light bulbs, genuine replacement for a conventional 40 W light bulb (outdoor use only in suitable lamps) Low heat generation (compared to the standard reference product).