Are these bulbs ok with plastic lenses?

[Duckstar]

As much as I do like the look of my sealed beam grille I have decided to swap my front end to composite headlights and have scored a set of these aftermarket light units

lights.jpg (88.02 KiB) Viewed 181 times

Im now looking at bulbs for them and want something brighter than a stock bulb, my main concern is the light units have plastic lenses so dont want anything thats gonna get too hot and melt the housing I was looking at these http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 1060775363 and wondered if they would be suitable? Anyone using a similar setup? Any input would be appreciated, cheers guys!