Phosphor and fluorescent lamp using the same

A fluorescent lamp comprising a phosphor film on an inner surface of a glass bulb, wherein said phosphor film contains a mixture of:

• a blue emitting first phosphor represented by a general formula (Ba.sub.w Ca.sub.x Mg.sub.y Eu.sub.z)O.aAl.sub.2 O.sub.3.bSiO.sub.2 where 0.1.ltoreq.w.ltoreq.0.5, 0.0004.ltoreq.x.ltoreq.0.0020, 0.1.ltoreq.y.ltoreq.0.8, 0.03.ltoreq.z.ltoreq.0.10, w+x+y+z=1, 1.5.ltoreq.a.ltoreq.4.5, and 0.0005.ltoreq.b.ltoreq.0.0030;
• a green emitting second phosphor represented by a general formula Ln.sub.2 O.sub.3.c(Mg.sub.1-u Ca.sub.u)O.d[(Al.sub.2 O.sub.3).sub.1-v (SiO.sub.2).sub.v ] (where Ln is at least one element selected from the group consisting of lanthanum, gadolinium, yttrium, cerium, and terbium, and 1.5.ltoreq.c.ltoreq.5.0, 2.5.ltoreq.d.ltoreq.14.0, 0.001.ltoreq.u.ltoreq.0.005, and 0.0002.ltoreq.v.ltoreq.0.0010);
• and
• a red emitting third phosphor represented by a general formula (Y.sub.1-t Eu.sub.t).sub.2 O.sub.3 (where 0.020.ltoreq.t.ltoreq.0.065), the first, second, and third phosphors being contained in ratios of 0.2 to 35% by weight, 35 to 60% by weight, and 30 to 60% by weight, respectively, with respect to 100% by weight of the mixture.