The LED lamps are immediately after switching full light without the Start shortens the life, as in fluorescent - saving lamps is the case. Such bulbs need a certain amount of time until they reach the full light output.
LED spotlights are perfect for when they are often turned on and off. I have energy saving 3 watt spotlights used very successfully why my PC work and for reading in bed. A warming is hard to feel and the warm white light is adequate and pleasant.