
I bought this for my Philips HF3470 Wake-Up Natural Light Therapy Sunrise Alarm Clock FM Radio. I really like how he slowly turns on the light. Everything works perfectly with the original halogen lamp. The problem with the halogen bulb was that it was very hot. Now with the LED lightbulb, gradual turning on doesn't work. When the alarm is on, the LED light will flash like a camera and then start flickering until it's fully lit. On the other hand, it does not generate heat like a halogen lamp.