Placing two Bus Transceivers next to each other can hang the game.

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java.lang.NullPointerException
	at eloraam.core.RenderContext.readGlobalLights(RenderContext.java:538)
	at eloraam.lighting.RenderLamp.renderWorldBlock(RenderLamp.java:34)
	at mod_RedPowerCore.renderWorldBlock(mod_RedPowerCore.java:109)
	at ModLoader.renderWorldBlock(ModLoader.java:1615)
	at vl.b(RenderBlocks.java:375)
	at vl.a(RenderBlocks.java:364)
	at fv.a(TileEntityRendererPiston.java:53)
	at fv.a(TileEntityRendererPiston.java:74)
	at ach.a(SourceFile:129)
	at ach.a(SourceFile:122)
	at l.a(RenderGlobal.java:440)
	at lr.a(EntityRenderer.java:1094)
	at lr.b(EntityRenderer.java:903)
	at EntityRendererProxy.b(EntityRendererProxy.java:21)
	at net.minecraft.client.Minecraft.x(Minecraft.java:869)
	at net.minecraft.client.Minecraft.run(Minecraft.java:747)
	at java.lang.Thread.run(Unknown Source)