Hi- i was told by someone that the UK light Cannon Lightbulb can be used on the heilos 4.5 10W, can i confrim this ? does anyone have any experience in this ? FWIW - i have the heilos 4.5 10 w adjustable. Just curious on the light bulb issue (would be great if someone can point me to a cheap source of these lightbulbs if they use the same as well ! )