We got the KWC Eve with a light about 15 years ago. It's perfect because even though the sink has a window over it, it faces north, and the kitchen is fairly dark even in the day. At night, I turn it on for a nightlight when quickly grabbing a glass of water before bed. I sometimes miss the sprayer, but for us, the light is more useful. At the time there weren't many kitchen faucets in this style. Now you see similar items all over, including at Costco. The Eve is still the most beautiful because of the solid machined housing and the faucet tucking inside. There are no seams for the faucet head like with others. It still works and is still gorgeous. The only issue is that after 15 years, I sometimes need to push the button two or three times to turn on the light, and was searching for a cause/fix. That's how I ran across this thread. I know this review is a little late, but hope that it helps someone out there.

LEDs in 3500 - 5000K range and with GU10 type bulbs

I bought the 3 bulbs on Amazon. There are apparently 2 kinds of GE grow bulbs, one for flowering stuff (sounded like outdoor kinds of plants) and one for budding and greens. I got the latter, in flood configuration. Screws in like regular bulb, non of those heat-dispersing fans. I like the fact that it's a BR-30 type of bulb, because it fits my lamp perfectly. A P38 would have been a tight squeeze. This bulb is said to last 5 years or 25000 hours, which would be great. I looked at a LOT of lamps before buying this one. The gooseneck feature was the big closer to the deal, as I saw I could aim the lights to where they were needed rather than just point the whole thing at one part of the plants. Got the lamp at BBB. With the 20% coupon, it was the cheapest price for the lamp anywhere I looked. Link to Amazon bulb listing

Hire an electrician, although Im not sure I follow can you post a picture of what you're speaking of?