My source was www.mastlight.com

1 @ BA15D Stacking D27LED Red, Tall version http://www.mastlight.com/Products/BA15DD27R.html
1 @ BA15D Stacking D27LED Green, Tall version http://www.mastlight.com/Products/BA15DD27G.html
1 @ BA15DD 12 LED White http://www.mastlight.com/Products/BA15DD12W.html
1 @ unknown masthead bulb, white http://www.mastlight.com/Products/BA15DD12W.html

May well have the same tilt issues - of which I was completely unaware!