On my car started with 410 glow worm bulbs in viva lights and because of the perspex couldnt correctly set the lights .The perspex caused too much reflection and refraction. Took off sheilds for sva then up graded to t5 halogen bulbs. their effect was again muted by the perspex. now have legal wattage HID from www.HID4U.co.uk and find the vision at night absolutely great .Have !st MOT tomorrow lets see if the car passes the test on lighting