Lights must be White or yellowas far as im aware
see below
http://www.irishstatutebook.ie/1963/en/si/0189.html#zzsi189y1963a11
Head lamps.
11. (1) Head lamps, in the case of a vehicle to which this Part of these Regulations applies, shall consist of two or four lamps fitted to the vehicle and shall comply with the provisions of this article.
(2) The colour of the light shown by the lamps shall be white or yellow but all lamps shall as nearly as possible show light of the same colour.
(3) The lamps shall, when lit, be capable of adequately illuminating the road for a distance of 325 feet in front of the vehicle at night time in clear weather.
(4) Where two lamps are fitted they shall be—
(a) as nearly as possible of the same power,
(b) as nearly as possible at the same height from the ground.
(c) fitted on opposite sides of the longitudinal axis of the vehicle, as nearly as possible equidistant from that axis, and as nearly as possible in the same longitudinal position in relation to the vehicle,
(d) fitted not less than 2 feet apart in the case of passenger vehicles, station wagons and goods vehicles, first registered on or after the 1st day of July, 1964.
(5) Where four lamps are fitted they shall be mounted in pairs and each lamp of a pair shall comply with the requirements of sub-article (4) of this article, provided that the requirements of paragraph (d) of that sub-article shall not apply to any pair of lamps which are extinguished when the lamps are dipped.